2311221013 has 4 divisors (see below), whose sum is σ = 2311816480. Its totient is φ = 2310625548.

The previous prime is 2311220999. The next prime is 2311221023. The reversal of 2311221013 is 3101221132.

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 2311221013 - 2⁵ = 2311220981 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 (2311221023) 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, 291873 + ... + 299686.

It is an arithmetic number, because the mean of its divisors is an integer number (577954120).

Almost surely, 2^2311221013 is an apocalyptic number.

It is an amenable number.

2311221013 is a deficient number, since it is larger than the sum of its proper divisors (595467).

2311221013 is an equidigital number, since it uses as much as digits as its factorization.

2311221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595466.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2311221013 is about 48075.1600413353. The cubic root of 2311221013 is about 1322.1492788204.

Adding to 2311221013 its reverse (3101221132), we get a palindrome (5412442145).

The spelling of 2311221013 in words is "two billion, three hundred eleven million, two hundred twenty-one thousand, thirteen".