21133121310131 has 8 divisors (see below), whose sum is σ = 22274337361680. Its totient is φ = 20019404440672.

The previous prime is 21133121310089. The next prime is 21133121310139. The reversal of 21133121310131 is 13101312133112.

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 21133121310131 - 2³⁴ = 21115941440947 is a prime.

It is a super-3 number, since 3×21133121310131³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21133121310097 and 21133121310106.

It is not an unprimeable number, because it can be changed into a prime (21133121310139) 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, 6874793945 + ... + 6874797018.

It is an arithmetic number, because the mean of its divisors is an integer number (2784292170210).

Almost surely, 2^{21133121310131} is an apocalyptic number.

21133121310131 is a deficient number, since it is larger than the sum of its proper divisors (1141216051549).

21133121310131 is a wasteful number, since it uses less digits than its factorization.

21133121310131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13749591045.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 21133121310131 its reverse (13101312133112), we get a palindrome (34234433443243).

The spelling of 21133121310131 in words is "twenty-one trillion, one hundred thirty-three billion, one hundred twenty-one million, three hundred ten thousand, one hundred thirty-one".