21231200112131 has 16 divisors (see below), whose sum is σ = 24213565411200. Its totient is φ = 18490359017088.

The previous prime is 21231200112119. The next prime is 21231200112137. The reversal of 21231200112131 is 13121100213212.

It is a cyclic number.

It is not a de Polignac number, because 21231200112131 - 2¹⁴ = 21231200095747 is a prime.

It is a super-2 number, since 2×21231200112131² (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 (21231200112137) 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, 764303201 + ... + 764330978.

It is an arithmetic number, because the mean of its divisors is an integer number (1513347838200).

Almost surely, 2^{21231200112131} is an apocalyptic number.

21231200112131 is a deficient number, since it is larger than the sum of its proper divisors (2982365299069).

21231200112131 is a wasteful number, since it uses less digits than its factorization.

21231200112131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528634258.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21231200112131 its reverse (13121100213212), we get a palindrome (34352300325343).

The spelling of 21231200112131 in words is "twenty-one trillion, two hundred thirty-one billion, two hundred million, one hundred twelve thousand, one hundred thirty-one".