112121110921 has 2 divisors, whose sum is σ = 112121110922. Its totient is φ = 112121110920.

The previous prime is 112121110891. The next prime is 112121111017. The reversal of 112121110921 is 129011121211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78252229696 + 33868881225 = 279736^2 + 184035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112121110921 is a prime.

It is a super-2 number, since 2×112121110921² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 112121110892 and 112121110901.

It is not a weakly prime, because it can be changed into another prime (112121110421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56060555460 + 56060555461.

It is an arithmetic number, because the mean of its divisors is an integer number (56060555461).

Almost surely, 2^112121110921 is an apocalyptic number.

It is an amenable number.

112121110921 is a deficient number, since it is larger than the sum of its proper divisors (1).

112121110921 is an equidigital number, since it uses as much as digits as its factorization.

112121110921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 112121110921 in words is "one hundred twelve billion, one hundred twenty-one million, one hundred ten thousand, nine hundred twenty-one".