1112122121 has 8 divisors (see below), whose sum is σ = 1214172288. Its totient is φ = 1010230000.

The previous prime is 1112122103. The next prime is 1112122147. The reversal of 1112122121 is 1212212111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1112122121 - 2¹⁴ = 1112105737 is a prime.

It is a super-2 number, since 2×1112122121² = 2473631224035077282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1112122096 and 1112122105.

It is not an unprimeable number, because it can be changed into a prime (1112122021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24545 + ... + 53166.

It is an arithmetic number, because the mean of its divisors is an integer number (151771536).

Almost surely, 2^1112122121 is an apocalyptic number.

1112122121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1112122121 is a deficient number, since it is larger than the sum of its proper divisors (102050167).

1112122121 is a wasteful number, since it uses less digits than its factorization.

1112122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79023.

The product of its digits is 16, while the sum is 14.

The square root of 1112122121 is about 33348.4950335094. The cubic root of 1112122121 is about 1036.0582176976.

Adding to 1112122121 its reverse (1212212111), we get a palindrome (2324334232).

It can be divided in two parts, 11 and 12122121, that multiplied together give a palindrome (133343331).

The spelling of 1112122121 in words is "one billion, one hundred twelve million, one hundred twenty-two thousand, one hundred twenty-one".