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1122121 = 711131959
BaseRepresentation
bin100010001111101001001
32010000021001
410101331021
5241401441
640015001
712352330
oct4217511
92100231
101122121
116a7080
12461461
133039a0
14212d17
15172731
hex111f49

1122121 has 32 divisors (see below), whose sum is σ = 1612800. Its totient is φ = 751680.

The previous prime is 1122113. The next prime is 1122131. The reversal of 1122121 is 1212211.

It is a cyclic number.

It is not a de Polignac number, because 1122121 - 23 = 1122113 is a prime.

It is an Ulam number.

1122121 is a modest number, since divided by 2121 gives 112 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1122098 and 1122107.

It is not an unprimeable number, because it can be changed into a prime (1122131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18990 + ... + 19048.

It is an arithmetic number, because the mean of its divisors is an integer number (50400).

21122121 is an apocalyptic number.

1122121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1122121 is a deficient number, since it is larger than the sum of its proper divisors (490679).

1122121 is a wasteful number, since it uses less digits than its factorization.

1122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109.

The product of its digits is 8, while the sum is 10.

The square root of 1122121 is about 1059.3021287621. The cubic root of 1122121 is about 103.9153959368.

Adding to 1122121 its reverse (1212211), we get a palindrome (2334332).

It can be divided in two parts, 11221 and 21, that multiplied together give a triangular number (235641 = T686).

The spelling of 1122121 in words is "one million, one hundred twenty-two thousand, one hundred twenty-one".

Divisors: 1 7 11 13 19 59 77 91 133 143 209 247 413 649 767 1001 1121 1463 1729 2717 4543 5369 7847 8437 12331 14573 19019 59059 86317 102011 160303 1122121