3901230031221 has 24 divisors (see below), whose sum is σ = 5851627845336. Its totient is φ = 2502626664960.

The previous prime is 3901230031199. The next prime is 3901230031243. The reversal of 3901230031221 is 1221300321093.

3901230031221 is a `hidden beast` number, since 39 + 0 + 12 + 300 + 312 + 2 + 1 = 666.

3901230031221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3901230031199) and next prime (3901230031243).

It can be written as a sum of positive squares in 4 ways, for example, as 33659406225 + 3867570624996 = 183465^2 + 1966614^2 .

It is not a de Polignac number, because 3901230031221 - 2¹⁰ = 3901230030197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3901230011221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72387030 + ... + 72440903.

It is an arithmetic number, because the mean of its divisors is an integer number (243817826889).

Almost surely, 2^{3901230031221} is an apocalyptic number.

It is an amenable number.

3901230031221 is a deficient number, since it is larger than the sum of its proper divisors (1950397814115).

3901230031221 is a wasteful number, since it uses less digits than its factorization.

3901230031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144828053 (or 144828050 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The spelling of 3901230031221 in words is "three trillion, nine hundred one billion, two hundred thirty million, thirty-one thousand, two hundred twenty-one".