2221012331 has 4 divisors (see below), whose sum is σ = 2221111464. Its totient is φ = 2220913200.

The previous prime is 2221012309. The next prime is 2221012337. The reversal of 2221012331 is 1332101222.

2221012331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221012331 is a prime.

It is a super-2 number, since 2×2221012331² = 9865791548908107122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221012337) 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, 1751 + ... + 66671.

It is an arithmetic number, because the mean of its divisors is an integer number (555277866).

Almost surely, 2^2221012331 is an apocalyptic number.

2221012331 is a deficient number, since it is larger than the sum of its proper divisors (99133).

2221012331 is an equidigital number, since it uses as much as digits as its factorization.

2221012331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99132.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2221012331 is about 47127.6174975990. The cubic root of 2221012331 is about 1304.7190091964.

Adding to 2221012331 its reverse (1332101222), we get a palindrome (3553113553).

The spelling of 2221012331 in words is "two billion, two hundred twenty-one million, twelve thousand, three hundred thirty-one".