25121531420402 has 8 divisors (see below), whose sum is σ = 37689144738816. Its totient is φ = 12558483174132.

The previous prime is 25121531420327. The next prime is 25121531420431. The reversal of 25121531420402 is 20402413512152.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1141254278 + ... + 1141276289.

It is an arithmetic number, because the mean of its divisors is an integer number (4711143092352).

Almost surely, 2^{25121531420402} is an apocalyptic number.

25121531420402 is a deficient number, since it is larger than the sum of its proper divisors (12567613318414).

25121531420402 is a wasteful number, since it uses less digits than its factorization.

25121531420402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2282536072.

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 25121531420402 its reverse (20402413512152), we get a palindrome (45523944932554).

The spelling of 25121531420402 in words is "twenty-five trillion, one hundred twenty-one billion, five hundred thirty-one million, four hundred twenty thousand, four hundred two".