21023311032001 has 2 divisors, whose sum is σ = 21023311032002. Its totient is φ = 21023311032000.

The previous prime is 21023311031981. The next prime is 21023311032019. The reversal of 21023311032001 is 10023011332012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20760963216400 + 262347815601 = 4556420^2 + 512199^2 .

It is a cyclic number.

It is not a de Polignac number, because 21023311032001 - 2⁵ = 21023311031969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21023311032001.

It is not a weakly prime, because it can be changed into another prime (21023311032041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511655516000 + 10511655516001.

It is an arithmetic number, because the mean of its divisors is an integer number (10511655516001).

Almost surely, 2^{21023311032001} is an apocalyptic number.

It is an amenable number.

21023311032001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023311032001 is an equidigital number, since it uses as much as digits as its factorization.

21023311032001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21023311032001 its reverse (10023011332012), we get a palindrome (31046322364013).

The spelling of 21023311032001 in words is "twenty-one trillion, twenty-three billion, three hundred eleven million, thirty-two thousand, one".