12425252421 has 16 divisors (see below), whose sum is σ = 17025044544. Its totient is φ = 8054751744.

The previous prime is 12425252419. The next prime is 12425252461.

12425252421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12425252421 - 2¹ = 12425252419 is a prime.

It is a super-2 number, since 2×12425252421² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12425252461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155386 + ... + 221348.

It is an arithmetic number, because the mean of its divisors is an integer number (1064065284).

Almost surely, 2^12425252421 is an apocalyptic number.

It is an amenable number.

12425252421 is a deficient number, since it is larger than the sum of its proper divisors (4599792123).

12425252421 is a wasteful number, since it uses less digits than its factorization.

12425252421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67700.

The product of its digits is 12800, while the sum is 30.

The spelling of 12425252421 in words is "twelve billion, four hundred twenty-five million, two hundred fifty-two thousand, four hundred twenty-one".