21312021211134 has 16 divisors (see below), whose sum is σ = 42642844409088. Its totient is φ = 7100873405912.

The previous prime is 21312021211067. The next prime is 21312021211237. The reversal of 21312021211134 is 43111212021312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 783401382 + ... + 783428585.

It is an arithmetic number, because the mean of its divisors is an integer number (2665177775568).

Almost surely, 2^{21312021211134} is an apocalyptic number.

21312021211134 is an abundant number, since it is smaller than the sum of its proper divisors (21330823197954).

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

21312021211134 is a wasteful number, since it uses less digits than its factorization.

21312021211134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566832239.

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 21312021211134 its reverse (43111212021312), we get a palindrome (64423233232446).

The spelling of 21312021211134 in words is "twenty-one trillion, three hundred twelve billion, twenty-one million, two hundred eleven thousand, one hundred thirty-four".