1232012210021 has 2 divisors, whose sum is σ = 1232012210022. Its totient is φ = 1232012210020.

The previous prime is 1232012209991. The next prime is 1232012210131. The reversal of 1232012210021 is 1200122102321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 900437779396 + 331574430625 = 948914^2 + 575825^2 .

It is an emirp because it is prime and its reverse (1200122102321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1232012210021 - 2²⁶ = 1231945101157 is a prime.

It is a super-2 number, since 2×1232012210021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1232012210321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616006105010 + 616006105011.

It is an arithmetic number, because the mean of its divisors is an integer number (616006105011).

Almost surely, 2^{1232012210021} is an apocalyptic number.

It is an amenable number.

1232012210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232012210021 is an equidigital number, since it uses as much as digits as its factorization.

1232012210021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1232012210021 its reverse (1200122102321), we get a palindrome (2432134312342).

The spelling of 1232012210021 in words is "one trillion, two hundred thirty-two billion, twelve million, two hundred ten thousand, twenty-one".