21210222031311 has 16 divisors (see below), whose sum is σ = 28340295644160. Its totient is φ = 14110150220160.

The previous prime is 21210222031307. The next prime is 21210222031337. The reversal of 21210222031311 is 11313022201212.

It is not a de Polignac number, because 21210222031311 - 2² = 21210222031307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210222030311) 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, 45075991 + ... + 45544103.

It is an arithmetic number, because the mean of its divisors is an integer number (1771268477760).

Almost surely, 2^{21210222031311} is an apocalyptic number.

21210222031311 is a deficient number, since it is larger than the sum of its proper divisors (7130073612849).

21210222031311 is a wasteful number, since it uses less digits than its factorization.

21210222031311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500126.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21210222031311 its reverse (11313022201212), we get a palindrome (32523244232523).

The spelling of 21210222031311 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-two million, thirty-one thousand, three hundred eleven".