121231022981 has 2 divisors, whose sum is σ = 121231022982. Its totient is φ = 121231022980.

The previous prime is 121231022963. The next prime is 121231023019. The reversal of 121231022981 is 189220132121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109183984900 + 12047038081 = 330430^2 + 109759^2 .

It is a cyclic number.

It is not a de Polignac number, because 121231022981 - 2¹⁴ = 121231006597 is a prime.

It is a super-2 number, since 2×121231022981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121231022911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60615511490 + 60615511491.

It is an arithmetic number, because the mean of its divisors is an integer number (60615511491).

Almost surely, 2^121231022981 is an apocalyptic number.

It is an amenable number.

121231022981 is a deficient number, since it is larger than the sum of its proper divisors (1).

121231022981 is an equidigital number, since it uses as much as digits as its factorization.

121231022981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The spelling of 121231022981 in words is "one hundred twenty-one billion, two hundred thirty-one million, twenty-two thousand, nine hundred eighty-one".