2311220401421 has 4 divisors (see below), whose sum is σ = 2311276538844. Its totient is φ = 2311164264000.

The previous prime is 2311220401417. The next prime is 2311220401433. The reversal of 2311220401421 is 1241040221132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 877058472196 + 1434161929225 = 936514^2 + 1197565^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311220401421 - 2² = 2311220401417 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 (2311220401621) 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, 28006910 + ... + 28089311.

It is an arithmetic number, because the mean of its divisors is an integer number (577819134711).

Almost surely, 2^{2311220401421} is an apocalyptic number.

It is an amenable number.

2311220401421 is a deficient number, since it is larger than the sum of its proper divisors (56137423).

2311220401421 is an equidigital number, since it uses as much as digits as its factorization.

2311220401421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56137422.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 2311220401421 its reverse (1241040221132), we get a palindrome (3552260622553).

The spelling of 2311220401421 in words is "two trillion, three hundred eleven billion, two hundred twenty million, four hundred one thousand, four hundred twenty-one".