125364570221 has 4 divisors (see below), whose sum is σ = 136761349344. Its totient is φ = 113967791100.

The previous prime is 125364570217. The next prime is 125364570241. The reversal of 125364570221 is 122075463521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122075463521 = 11 ⋅11097769411.

It is a cyclic number.

It is not a de Polignac number, because 125364570221 - 2² = 125364570217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125364570241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5698389545 + ... + 5698389566.

It is an arithmetic number, because the mean of its divisors is an integer number (34190337336).

Almost surely, 2^125364570221 is an apocalyptic number.

125364570221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125364570221 is a deficient number, since it is larger than the sum of its proper divisors (11396779123).

125364570221 is a wasteful number, since it uses less digits than its factorization.

125364570221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11396779122.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 125364570221 in words is "one hundred twenty-five billion, three hundred sixty-four million, five hundred seventy thousand, two hundred twenty-one".