21311211233010 has 32 divisors (see below), whose sum is σ = 51151664257920. Its totient is φ = 5682461073408.

The previous prime is 21311211232991. The next prime is 21311211233033. The reversal of 21311211233010 is 1033211211312.

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, 32708830 + ... + 33354009.

It is an arithmetic number, because the mean of its divisors is an integer number (1598489508060).

Almost surely, 2^{21311211233010} is an apocalyptic number.

21311211233010 is an abundant number, since it is smaller than the sum of its proper divisors (29840453024910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21311211233010 is a wasteful number, since it uses less digits than its factorization.

21311211233010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66073602.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21311211233010 its reverse (1033211211312), we get a palindrome (22344422444322).

The spelling of 21311211233010 in words is "twenty-one trillion, three hundred eleven billion, two hundred eleven million, two hundred thirty-three thousand, ten".