21233031115001 has 2 divisors, whose sum is σ = 21233031115002. Its totient is φ = 21233031115000.

The previous prime is 21233031114989. The next prime is 21233031115063. The reversal of 21233031115001 is 10051113033212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12785637641401 + 8447393473600 = 3575701^2 + 2906440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21233031115001 is a prime.

It is a super-2 number, since 2×21233031115001² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21233031115201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616515557500 + 10616515557501.

It is an arithmetic number, because the mean of its divisors is an integer number (10616515557501).

Almost surely, 2^{21233031115001} is an apocalyptic number.

It is an amenable number.

21233031115001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233031115001 is an equidigital number, since it uses as much as digits as its factorization.

21233031115001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

Adding to 21233031115001 its reverse (10051113033212), we get a palindrome (31284144148213).

The spelling of 21233031115001 in words is "twenty-one trillion, two hundred thirty-three billion, thirty-one million, one hundred fifteen thousand, one".