6401121512125 has 16 divisors (see below), whose sum is σ = 8033228723520. Its totient is φ = 5092288827600.

The previous prime is 6401121512113. The next prime is 6401121512173. The reversal of 6401121512125 is 5212151211046.

It is not a de Polignac number, because 6401121512125 - 2³¹ = 6398974028477 is a prime.

It is a super-2 number, since 2×6401121512125² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143019447 + ... + 143064196.

It is an arithmetic number, because the mean of its divisors is an integer number (502076795220).

Almost surely, 2^{6401121512125} is an apocalyptic number.

It is an amenable number.

6401121512125 is a deficient number, since it is larger than the sum of its proper divisors (1632107211395).

6401121512125 is a wasteful number, since it uses less digits than its factorization.

6401121512125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286083837 (or 286083827 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 31.

The spelling of 6401121512125 in words is "six trillion, four hundred one billion, one hundred twenty-one million, five hundred twelve thousand, one hundred twenty-five".