21121151414131 has 16 divisors (see below), whose sum is σ = 21860044734528. Its totient is φ = 20393090368000.

The previous prime is 21121151414059. The next prime is 21121151414201. The reversal of 21121151414131 is 13141415112112.

It is a happy number.

It is not a de Polignac number, because 21121151414131 - 2⁷ = 21121151414003 is a prime.

It is a super-2 number, since 2×21121151414131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21121151414131.

It is not an unprimeable number, because it can be changed into a prime (21121151414731) 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, 8401626 + ... + 10622128.

It is an arithmetic number, because the mean of its divisors is an integer number (1366252795908).

Almost surely, 2^{21121151414131} is an apocalyptic number.

21121151414131 is a deficient number, since it is larger than the sum of its proper divisors (738893320397).

21121151414131 is a wasteful number, since it uses less digits than its factorization.

21121151414131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222942.

The product of its digits is 960, while the sum is 28.

Adding to 21121151414131 its reverse (13141415112112), we get a palindrome (34262566526243).

The spelling of 21121151414131 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred fifty-one million, four hundred fourteen thousand, one hundred thirty-one".