121232000921 has 2 divisors, whose sum is σ = 121232000922. Its totient is φ = 121232000920.

The previous prime is 121232000899. The next prime is 121232000963. The reversal of 121232000921 is 129000232121.

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., 76845938521 + 44386062400 = 277211^2 + 210680^2 .

It is a cyclic number.

It is not a de Polignac number, because 121232000921 - 2¹⁰ = 121231999897 is a prime.

It is not a weakly prime, because it can be changed into another prime (121232000221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60616000460 + 60616000461.

It is an arithmetic number, because the mean of its divisors is an integer number (60616000461).

Almost surely, 2^121232000921 is an apocalyptic number.

It is an amenable number.

121232000921 is a deficient number, since it is larger than the sum of its proper divisors (1).

121232000921 is an equidigital number, since it uses as much as digits as its factorization.

121232000921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 121232000921 in words is "one hundred twenty-one billion, two hundred thirty-two million, nine hundred twenty-one", and thus it is an aban number.