21320233111131 has 16 divisors (see below), whose sum is σ = 28704579321600. Its totient is φ = 14074703318880.

The previous prime is 21320233111127. The next prime is 21320233111153. The reversal of 21320233111131 is 13111133202312.

It is not a de Polignac number, because 21320233111131 - 2² = 21320233111127 is a prime.

It is a super-2 number, since 2×21320233111131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21320233111171) 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, 3600045 + ... + 7456593.

It is an arithmetic number, because the mean of its divisors is an integer number (1794036207600).

Almost surely, 2^{21320233111131} is an apocalyptic number.

21320233111131 is a deficient number, since it is larger than the sum of its proper divisors (7384346210469).

21320233111131 is a wasteful number, since it uses less digits than its factorization.

21320233111131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3874546.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 21320233111131 its reverse (13111133202312), we get a palindrome (34431366313443).

The spelling of 21320233111131 in words is "twenty-one trillion, three hundred twenty billion, two hundred thirty-three million, one hundred eleven thousand, one hundred thirty-one".