21425210501131 has 8 divisors (see below), whose sum is σ = 21436175595744. Its totient is φ = 21414246305280.

The previous prime is 21425210501129. The next prime is 21425210501239. The reversal of 21425210501131 is 13110501252412.

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 21425210501131 - 2¹ = 21425210501129 is a prime.

It is a super-2 number, since 2×21425210501131² (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 21425210501131.

It is not an unprimeable number, because it can be changed into a prime (21425210501531) 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, 50365035 + ... + 50788651.

It is an arithmetic number, because the mean of its divisors is an integer number (2679521949468).

Almost surely, 2^{21425210501131} is an apocalyptic number.

21425210501131 is a deficient number, since it is larger than the sum of its proper divisors (10965094613).

21425210501131 is a wasteful number, since it uses less digits than its factorization.

21425210501131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449381.

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 21425210501131 its reverse (13110501252412), we get a palindrome (34535711753543).

The spelling of 21425210501131 in words is "twenty-one trillion, four hundred twenty-five billion, two hundred ten million, five hundred one thousand, one hundred thirty-one".