21000023033311 has 12 divisors (see below), whose sum is σ = 24429952711200. Its totient is φ = 17999021698560.

The previous prime is 21000023033291. The next prime is 21000023033357. The reversal of 21000023033311 is 11333032000012.

It is not a de Polignac number, because 21000023033311 - 2²⁹ = 20999486162399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000023013311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10988055 + ... + 12756856.

It is an arithmetic number, because the mean of its divisors is an integer number (2035829392600).

Almost surely, 2^{21000023033311} is an apocalyptic number.

21000023033311 is a deficient number, since it is larger than the sum of its proper divisors (3429929677889).

21000023033311 is a wasteful number, since it uses less digits than its factorization.

21000023033311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23762974 (or 23762967 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21000023033311 its reverse (11333032000012), we get a palindrome (32333055033323).

The spelling of 21000023033311 in words is "twenty-one trillion, twenty-three million, thirty-three thousand, three hundred eleven".