21640211336131 has 16 divisors (see below), whose sum is σ = 22087961966880. Its totient is φ = 21197846292480.

The previous prime is 21640211336101. The next prime is 21640211336137. The reversal of 21640211336131 is 13163311204612.

It is a cyclic number.

It is not a de Polignac number, because 21640211336131 - 2¹³ = 21640211327939 is a prime.

It is a super-2 number, since 2×21640211336131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21640211336137) 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, 2157771 + ... + 6923611.

It is an arithmetic number, because the mean of its divisors is an integer number (1380497622930).

Almost surely, 2^{21640211336131} is an apocalyptic number.

21640211336131 is a deficient number, since it is larger than the sum of its proper divisors (447750630749).

21640211336131 is a wasteful number, since it uses less digits than its factorization.

21640211336131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4766406.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 21640211336131 in words is "twenty-one trillion, six hundred forty billion, two hundred eleven million, three hundred thirty-six thousand, one hundred thirty-one".