125011654221 has 16 divisors (see below), whose sum is σ = 170128921536. Its totient is φ = 81623333376.

The previous prime is 125011654181. The next prime is 125011654253. The reversal of 125011654221 is 122456110521.

It is not a de Polignac number, because 125011654221 - 2⁹ = 125011653709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125011650221) 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, 608740 + ... + 787773.

It is an arithmetic number, because the mean of its divisors is an integer number (10633057596).

Almost surely, 2^125011654221 is an apocalyptic number.

It is an amenable number.

125011654221 is a deficient number, since it is larger than the sum of its proper divisors (45117267315).

125011654221 is a wasteful number, since it uses less digits than its factorization.

125011654221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397132.

The product of its (nonzero) digits is 4800, while the sum is 30.

Adding to 125011654221 its reverse (122456110521), we get a palindrome (247467764742).

The spelling of 125011654221 in words is "one hundred twenty-five billion, eleven million, six hundred fifty-four thousand, two hundred twenty-one".