3112291721 has 8 divisors (see below), whose sum is σ = 3880259904. Its totient is φ = 2425162320.

The previous prime is 3112291703. The next prime is 3112291723. The reversal of 3112291721 is 1271922113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3112291721 - 2¹⁸ = 3112029577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3112291723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20209610 + ... + 20209763.

It is an arithmetic number, because the mean of its divisors is an integer number (485032488).

Almost surely, 2^3112291721 is an apocalyptic number.

It is an amenable number.

3112291721 is a deficient number, since it is larger than the sum of its proper divisors (767968183).

3112291721 is a wasteful number, since it uses less digits than its factorization.

3112291721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40419391.

The product of its digits is 1512, while the sum is 29.

The square root of 3112291721 is about 55787.9173387930. The cubic root of 3112291721 is about 1460.0243507855.

The spelling of 3112291721 in words is "three billion, one hundred twelve million, two hundred ninety-one thousand, seven hundred twenty-one".