3125145032221 has 4 divisors (see below), whose sum is σ = 3197822823712. Its totient is φ = 3052467240732.

The previous prime is 3125145032197. The next prime is 3125145032239. The reversal of 3125145032221 is 1222305415213.

It is a happy number.

3125145032221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3125145032221 - 2³³ = 3116555097629 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 (3125145033221) 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, 36338895681 + ... + 36338895766.

It is an arithmetic number, because the mean of its divisors is an integer number (799455705928).

Almost surely, 2^{3125145032221} is an apocalyptic number.

It is an amenable number.

3125145032221 is a deficient number, since it is larger than the sum of its proper divisors (72677791491).

3125145032221 is an equidigital number, since it uses as much as digits as its factorization.

3125145032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72677791490.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 3125145032221 in words is "three trillion, one hundred twenty-five billion, one hundred forty-five million, thirty-two thousand, two hundred twenty-one".