312222244021 has 4 divisors (see below), whose sum is σ = 322293929344. Its totient is φ = 302150558700.

The previous prime is 312222243881. The next prime is 312222244057. The reversal of 312222244021 is 120442222213.

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 312222244021 - 2¹¹ = 312222241973 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 (312222244121) 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, 5035842615 + ... + 5035842676.

It is an arithmetic number, because the mean of its divisors is an integer number (80573482336).

Almost surely, 2^312222244021 is an apocalyptic number.

312222244021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

312222244021 is a deficient number, since it is larger than the sum of its proper divisors (10071685323).

312222244021 is a wasteful number, since it uses less digits than its factorization.

312222244021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10071685322.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 312222244021 its reverse (120442222213), we get a palindrome (432664466234).

The spelling of 312222244021 in words is "three hundred twelve billion, two hundred twenty-two million, two hundred forty-four thousand, twenty-one".