21403231024131 has 108 divisors (see below), whose sum is σ = 35733781064800. Its totient is φ = 12807419470560.

The previous prime is 21403231024129. The next prime is 21403231024187. The reversal of 21403231024131 is 13142013230412.

21403231024131 is a `hidden beast` number, since 2 + 1 + 403 + 2 + 3 + 10 + 241 + 3 + 1 = 666.

It is not a de Polignac number, because 21403231024131 - 2¹ = 21403231024129 is a prime.

It is a super-2 number, since 2×21403231024131² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21403231024095 and 21403231024104.

It is not an unprimeable number, because it can be changed into a prime (21403231024111) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 62545965 + ... + 62887233.

Almost surely, 2^{21403231024131} is an apocalyptic number.

21403231024131 is a deficient number, since it is larger than the sum of its proper divisors (14330550040669).

21403231024131 is an frugal number, since it uses more digits than its factorization.

21403231024131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341394 (or 341362 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 21403231024131 its reverse (13142013230412), we get a palindrome (34545244254543).

The spelling of 21403231024131 in words is "twenty-one trillion, four hundred three billion, two hundred thirty-one million, twenty-four thousand, one hundred thirty-one".