125210521401 has 32 divisors (see below), whose sum is σ = 192148740096. Its totient is φ = 71042400000.

The previous prime is 125210521369. The next prime is 125210521427. The reversal of 125210521401 is 104125012521.

It is a happy number.

It is not a de Polignac number, because 125210521401 - 2⁵ = 125210521369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125210521801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8018001 + ... + 8033601.

It is an arithmetic number, because the mean of its divisors is an integer number (6004648128).

Almost surely, 2^125210521401 is an apocalyptic number.

It is an amenable number.

125210521401 is a deficient number, since it is larger than the sum of its proper divisors (66938218695).

125210521401 is a wasteful number, since it uses less digits than its factorization.

125210521401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18293.

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

Adding to 125210521401 its reverse (104125012521), we get a palindrome (229335533922).

The spelling of 125210521401 in words is "one hundred twenty-five billion, two hundred ten million, five hundred twenty-one thousand, four hundred one".