21021231200131 has 8 divisors (see below), whose sum is σ = 21062718932544. Its totient is φ = 20979766906560.

The previous prime is 21021231200129. The next prime is 21021231200159. The reversal of 21021231200131 is 13100213212012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21021231200131 - 2¹ = 21021231200129 is a prime.

It is a super-2 number, since 2×21021231200131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21021231200099 and 21021231200108.

It is not an unprimeable number, because it can be changed into a prime (21021231200731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4063690 + ... + 7652191.

It is an arithmetic number, because the mean of its divisors is an integer number (2632839866568).

Almost surely, 2^{21021231200131} is an apocalyptic number.

21021231200131 is a deficient number, since it is larger than the sum of its proper divisors (41487732413).

21021231200131 is a wasteful number, since it uses less digits than its factorization.

21021231200131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11719421.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21021231200131 its reverse (13100213212012), we get a palindrome (34121444412143).

The spelling of 21021231200131 in words is "twenty-one trillion, twenty-one billion, two hundred thirty-one million, two hundred thousand, one hundred thirty-one".