21013233001031 has 2 divisors, whose sum is σ = 21013233001032. Its totient is φ = 21013233001030.

The previous prime is 21013233000983. The next prime is 21013233001039. The reversal of 21013233001031 is 13010033231012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21013233001031 - 2¹⁸ = 21013232738887 is a prime.

It is a super-2 number, since 2×21013233001031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21013233000994 and 21013233001012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21013233001039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506616500515 + 10506616500516.

It is an arithmetic number, because the mean of its divisors is an integer number (10506616500516).

Almost surely, 2^{21013233001031} is an apocalyptic number.

21013233001031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21013233001031 is an equidigital number, since it uses as much as digits as its factorization.

21013233001031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21013233001031 its reverse (13010033231012), we get a palindrome (34023266232043).

The spelling of 21013233001031 in words is "twenty-one trillion, thirteen billion, two hundred thirty-three million, one thousand, thirty-one".