125810021933 has 4 divisors (see below), whose sum is σ = 125849750400. Its totient is φ = 125770293468.

The previous prime is 125810021899. The next prime is 125810021969. The reversal of 125810021933 is 339120018521.

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.

It is a cyclic number.

It is not a de Polignac number, because 125810021933 - 2⁸ = 125810021677 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125810021893 and 125810021902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125810020933) 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, 19859483 + ... + 19865816.

It is an arithmetic number, because the mean of its divisors is an integer number (31462437600).

Almost surely, 2^125810021933 is an apocalyptic number.

It is an amenable number.

125810021933 is a deficient number, since it is larger than the sum of its proper divisors (39728467).

125810021933 is an equidigital number, since it uses as much as digits as its factorization.

125810021933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39728466.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 125810021933 in words is "one hundred twenty-five billion, eight hundred ten million, twenty-one thousand, nine hundred thirty-three".