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1123121101 is a prime number
BaseRepresentation
bin100001011110001…
…0111011111001101
32220021100110111211
41002330113133031
54300004333401
6303240214421
736555241354
oct10274273715
92807313454
101123121101
11526a77563
1227416a411
1314b8b78cb
14a923a99b
1568901951
hex42f177cd

1123121101 has 2 divisors, whose sum is σ = 1123121102. Its totient is φ = 1123121100.

The previous prime is 1123121063. The next prime is 1123121107. The reversal of 1123121101 is 1011213211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 930189001 + 192932100 = 30499^2 + 13890^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123121101 - 215 = 1123088333 is a prime.

It is a super-2 number, since 2×11231211012 = 2522802015022904402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123121107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561560550 + 561560551.

It is an arithmetic number, because the mean of its divisors is an integer number (561560551).

Almost surely, 21123121101 is an apocalyptic number.

It is an amenable number.

1123121101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123121101 is an equidigital number, since it uses as much as digits as its factorization.

1123121101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1123121101 is about 33512.9989854683. The cubic root of 1123121101 is about 1039.4625863095.

Adding to 1123121101 its reverse (1011213211), we get a palindrome (2134334312).

It can be divided in two parts, 112 and 3121101, that added together give a palindrome (3121213).

The spelling of 1123121101 in words is "one billion, one hundred twenty-three million, one hundred twenty-one thousand, one hundred one".