4764921221 has 4 divisors (see below), whose sum is σ = 4775926092. Its totient is φ = 4753916352.

The previous prime is 4764921193. The next prime is 4764921229. The reversal of 4764921221 is 1221294674.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1221294674 = 2 ⋅610647337.

It can be written as a sum of positive squares in 2 ways, for example, as 564585121 + 4200336100 = 23761^2 + 64810^2 .

It is a cyclic number.

It is not a de Polignac number, because 4764921221 - 2²² = 4760726917 is a prime.

It is a super-2 number, since 2×4764921221² = 45408948484672261682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4764921229) 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, 5501786 + ... + 5502651.

It is an arithmetic number, because the mean of its divisors is an integer number (1193981523).

Almost surely, 2^4764921221 is an apocalyptic number.

It is an amenable number.

4764921221 is a deficient number, since it is larger than the sum of its proper divisors (11004871).

4764921221 is a wasteful number, since it uses less digits than its factorization.

4764921221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11004870.

The product of its digits is 48384, while the sum is 38.

The square root of 4764921221 is about 69028.4087966686. The cubic root of 4764921221 is about 1682.7460311826.

The spelling of 4764921221 in words is "four billion, seven hundred sixty-four million, nine hundred twenty-one thousand, two hundred twenty-one".