21200011032131 has 4 divisors (see below), whose sum is σ = 21201516408072. Its totient is φ = 21198505656192.

The previous prime is 21200011032113. The next prime is 21200011032149. The reversal of 21200011032131 is 13123011000212.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21200011032113) and next prime (21200011032149).

It is a cyclic number.

It is not a de Polignac number, because 21200011032131 - 2³⁴ = 21182831162947 is a prime.

It is a super-2 number, since 2×21200011032131² (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 (21200011032331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752666846 + ... + 752695011.

It is an arithmetic number, because the mean of its divisors is an integer number (5300379102018).

Almost surely, 2^{21200011032131} is an apocalyptic number.

21200011032131 is a deficient number, since it is larger than the sum of its proper divisors (1505375941).

21200011032131 is a wasteful number, since it uses less digits than its factorization.

21200011032131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505375940.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21200011032131 its reverse (13123011000212), we get a palindrome (34323022032343).

The spelling of 21200011032131 in words is "twenty-one trillion, two hundred billion, eleven million, thirty-two thousand, one hundred thirty-one".