21331311110213 has 16 divisors (see below), whose sum is σ = 23187249219456. Its totient is φ = 19506102955200.

The previous prime is 21331311110183. The next prime is 21331311110227. The reversal of 21331311110213 is 31201111313312.

It is a cyclic number.

It is not a de Polignac number, because 21331311110213 - 2²² = 21331306915909 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 (21331311118213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165872288 + ... + 166000838.

It is an arithmetic number, because the mean of its divisors is an integer number (1449203076216).

Almost surely, 2^{21331311110213} is an apocalyptic number.

It is an amenable number.

21331311110213 is a deficient number, since it is larger than the sum of its proper divisors (1855938109243).

21331311110213 is a wasteful number, since it uses less digits than its factorization.

21331311110213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247964.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 21331311110213 its reverse (31201111313312), we get a palindrome (52532422423525).

The spelling of 21331311110213 in words is "twenty-one trillion, three hundred thirty-one billion, three hundred eleven million, one hundred ten thousand, two hundred thirteen".