4312213021 has 4 divisors (see below), whose sum is σ = 4317453472. Its totient is φ = 4306972572.

The previous prime is 4312212973. The next prime is 4312213027. The reversal of 4312213021 is 1203122134.

It is a happy number.

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 4312213021 - 2⁷ = 4312212893 is a prime.

It is a super-2 number, since 2×4312213021² = 37190362276963892882, 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 4312213021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4312213027) 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, 2618991 + ... + 2620636.

It is an arithmetic number, because the mean of its divisors is an integer number (1079363368).

Almost surely, 2^4312213021 is an apocalyptic number.

It is an amenable number.

4312213021 is a deficient number, since it is larger than the sum of its proper divisors (5240451).

4312213021 is an equidigital number, since it uses as much as digits as its factorization.

4312213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5240450.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 4312213021 is about 65667.4426257030. The cubic root of 4312213021 is about 1627.6714113512.

Adding to 4312213021 its reverse (1203122134), we get a palindrome (5515335155).

The spelling of 4312213021 in words is "four billion, three hundred twelve million, two hundred thirteen thousand, twenty-one".