25120511421 has 8 divisors (see below), whose sum is σ = 33699500640. Its totient is φ = 16644264912.

The previous prime is 25120511411. The next prime is 25120511503. The reversal of 25120511421 is 12411502152.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25120511421 - 2¹⁵ = 25120478653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25120511391 and 25120511400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25120511411) 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, 25685106 + ... + 25686083.

It is an arithmetic number, because the mean of its divisors is an integer number (4212437580).

Almost surely, 2^25120511421 is an apocalyptic number.

It is an amenable number.

25120511421 is a deficient number, since it is larger than the sum of its proper divisors (8578989219).

25120511421 is a wasteful number, since it uses less digits than its factorization.

25120511421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51371355.

The product of its (nonzero) digits is 800, while the sum is 24.

The spelling of 25120511421 in words is "twenty-five billion, one hundred twenty million, five hundred eleven thousand, four hundred twenty-one".