21002013311 has 2 divisors, whose sum is σ = 21002013312. Its totient is φ = 21002013310.

The previous prime is 21002013301. The next prime is 21002013343. The reversal of 21002013311 is 11331020012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21002013311 - 2⁶ = 21002013247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002013301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501006655 + 10501006656.

It is an arithmetic number, because the mean of its divisors is an integer number (10501006656).

Almost surely, 2^21002013311 is an apocalyptic number.

21002013311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002013311 is an equidigital number, since it uses as much as digits as its factorization.

21002013311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21002013311 its reverse (11331020012), we get a palindrome (32333033323).

The spelling of 21002013311 in words is "twenty-one billion, two million, thirteen thousand, three hundred eleven".