125131621422 has 16 divisors (see below), whose sum is σ = 250280739072. Its totient is φ = 41707624440.

The previous prime is 125131621411. The next prime is 125131621499. The reversal of 125131621422 is 224126131521.

It is a self number, because there is not a number n which added to its sum of digits gives 125131621422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635104 + ... + 808467.

It is an arithmetic number, because the mean of its divisors is an integer number (15642546192).

Almost surely, 2^125131621422 is an apocalyptic number.

125131621422 is an abundant number, since it is smaller than the sum of its proper divisors (125149117650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125131621422 is a wasteful number, since it uses less digits than its factorization.

125131621422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458023.

The product of its digits is 5760, while the sum is 30.

Adding to 125131621422 its reverse (224126131521), we get a palindrome (349257752943).

The spelling of 125131621422 in words is "one hundred twenty-five billion, one hundred thirty-one million, six hundred twenty-one thousand, four hundred twenty-two".