2311244023221 has 24 divisors (see below), whose sum is σ = 3816339556224. Its totient is φ = 1320381125280.

The previous prime is 2311244023219. The next prime is 2311244023229. The reversal of 2311244023221 is 1223204421132.

2311244023221 is a `hidden beast` number, since 2 + 3 + 11 + 24 + 402 + 3 + 221 = 666.

It is not a de Polignac number, because 2311244023221 - 2¹ = 2311244023219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311244023229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4325350 + ... + 4830231.

It is an arithmetic number, because the mean of its divisors is an integer number (159014148176).

Almost surely, 2^{2311244023221} is an apocalyptic number.

2311244023221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2311244023221 is a deficient number, since it is larger than the sum of its proper divisors (1505095533003).

2311244023221 is a wasteful number, since it uses less digits than its factorization.

2311244023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9159601 (or 9159598 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 2311244023221 its reverse (1223204421132), we get a palindrome (3534448444353).

The spelling of 2311244023221 in words is "two trillion, three hundred eleven billion, two hundred forty-four million, twenty-three thousand, two hundred twenty-one".