21021111333334 has 32 divisors (see below), whose sum is σ = 37367789356800. Its totient is φ = 8677630943520.

The previous prime is 21021111333269. The next prime is 21021111333347. The reversal of 21021111333334 is 43333311112012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61615252 + ... + 61955479.

It is an arithmetic number, because the mean of its divisors is an integer number (1167743417400).

Almost surely, 2^{21021111333334} is an apocalyptic number.

21021111333334 is a deficient number, since it is larger than the sum of its proper divisors (16346678023466).

21021111333334 is a wasteful number, since it uses less digits than its factorization.

21021111333334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123571188.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 21021111333334 its reverse (43333311112012), we get a palindrome (64354422445346).

The spelling of 21021111333334 in words is "twenty-one trillion, twenty-one billion, one hundred eleven million, three hundred thirty-three thousand, three hundred thirty-four".