12200623204621 has 2 divisors, whose sum is σ = 12200623204622. Its totient is φ = 12200623204620.

The previous prime is 12200623204607. The next prime is 12200623204703. The reversal of 12200623204621 is 12640232600221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9710633883721 + 2489989320900 = 3116189^2 + 1577970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12200623204621 is a prime.

It is a super-2 number, since 2×12200623204621² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12200623204921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6100311602310 + 6100311602311.

It is an arithmetic number, because the mean of its divisors is an integer number (6100311602311).

Almost surely, 2^{12200623204621} is an apocalyptic number.

It is an amenable number.

12200623204621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12200623204621 is an equidigital number, since it uses as much as digits as its factorization.

12200623204621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 12200623204621 its reverse (12640232600221), we get a palindrome (24840855804842).

The spelling of 12200623204621 in words is "twelve trillion, two hundred billion, six hundred twenty-three million, two hundred four thousand, six hundred twenty-one".