3264120021 has 4 divisors (see below), whose sum is σ = 4352160032. Its totient is φ = 2176080012.

The previous prime is 3264120017. The next prime is 3264120053. The reversal of 3264120021 is 1200214623.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1200214623 = 3 ⋅400071541.

It is not a de Polignac number, because 3264120021 - 2² = 3264120017 is a prime.

It is a super-2 number, since 2×3264120021² = 21308959022986080882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3264120021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3264120221) 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, 544020001 + ... + 544020006.

It is an arithmetic number, because the mean of its divisors is an integer number (1088040008).

Almost surely, 2^3264120021 is an apocalyptic number.

It is an amenable number.

3264120021 is a deficient number, since it is larger than the sum of its proper divisors (1088040011).

3264120021 is a wasteful number, since it uses less digits than its factorization.

3264120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088040010.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 3264120021 is about 57132.4778125367. The cubic root of 3264120021 is about 1483.3900892422.

Adding to 3264120021 its reverse (1200214623), we get a palindrome (4464334644).

The spelling of 3264120021 in words is "three billion, two hundred sixty-four million, one hundred twenty thousand, twenty-one".