21503410134131 has 8 divisors (see below), whose sum is σ = 22722370644480. Its totient is φ = 20308118760072.

The previous prime is 21503410134127. The next prime is 21503410134137. The reversal of 21503410134131 is 13143101430512.

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 21503410134131 - 2² = 21503410134127 is a prime.

It is a super-2 number, since 2×21503410134131² (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 = 21503410134094 and 21503410134103.

It is not an unprimeable number, because it can be changed into a prime (21503410134137) 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, 5917282205 + ... + 5917285838.

It is an arithmetic number, because the mean of its divisors is an integer number (2840296330560).

Almost surely, 2^{21503410134131} is an apocalyptic number.

21503410134131 is a deficient number, since it is larger than the sum of its proper divisors (1218960510349).

21503410134131 is a wasteful number, since it uses less digits than its factorization.

21503410134131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11834568145.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 21503410134131 its reverse (13143101430512), we get a palindrome (34646511564643).

The spelling of 21503410134131 in words is "twenty-one trillion, five hundred three billion, four hundred ten million, one hundred thirty-four thousand, one hundred thirty-one".