2930921021 has 4 divisors (see below), whose sum is σ = 3349624032. Its totient is φ = 2512218012.

The previous prime is 2930921017. The next prime is 2930921099. The reversal of 2930921021 is 1201290392.

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 2930921021 - 2² = 2930921017 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 (2930921011) 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, 209351495 + ... + 209351508.

It is an arithmetic number, because the mean of its divisors is an integer number (837406008).

Almost surely, 2^2930921021 is an apocalyptic number.

It is an amenable number.

2930921021 is a deficient number, since it is larger than the sum of its proper divisors (418703011).

2930921021 is an equidigital number, since it uses as much as digits as its factorization.

2930921021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418703010.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 2930921021 is about 54137.9813162626. The cubic root of 2930921021 is about 1431.0935969238.

The spelling of 2930921021 in words is "two billion, nine hundred thirty million, nine hundred twenty-one thousand, twenty-one".