21041320432131 has 28 divisors (see below), whose sum is σ = 31673236737240. Its totient is φ = 13971660192000.

The previous prime is 21041320432061. The next prime is 21041320432157. The reversal of 21041320432131 is 13123402314012.

21041320432131 is a `hidden beast` number, since 2 + 1 + 0 + 413 + 204 + 32 + 13 + 1 = 666.

It is not a de Polignac number, because 21041320432131 - 2¹³ = 21041320423939 is a prime.

It is a super-2 number, since 2×21041320432131² (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 junction number, because it is equal to n+sod(n) for n = 21041320432095 and 21041320432104.

It is not an unprimeable number, because it can be changed into a prime (21041320430131) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 57313566 + ... + 57679523.

It is an arithmetic number, because the mean of its divisors is an integer number (1131187026330).

Almost surely, 2^{21041320432131} is an apocalyptic number.

21041320432131 is a deficient number, since it is larger than the sum of its proper divisors (10631916305109).

21041320432131 is an equidigital number, since it uses as much as digits as its factorization.

21041320432131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114993358 (or 114993343 counting only the distinct ones).

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

Adding to 21041320432131 its reverse (13123402314012), we get a palindrome (34164722746143).

The spelling of 21041320432131 in words is "twenty-one trillion, forty-one billion, three hundred twenty million, four hundred thirty-two thousand, one hundred thirty-one".