2311221220023 has 8 divisors (see below), whose sum is σ = 3164915544688. Its totient is φ = 1499170521024.

The previous prime is 2311221220001. The next prime is 2311221220093. The reversal of 2311221220023 is 3200221221132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2311221220023 - 2²¹ = 2311219122871 is a prime.

It is a super-2 number, since 2×2311221220023² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311221220093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10410906286 + ... + 10410906507.

It is an arithmetic number, because the mean of its divisors is an integer number (395614443086).

Almost surely, 2^{2311221220023} is an apocalyptic number.

2311221220023 is a deficient number, since it is larger than the sum of its proper divisors (853694324665).

2311221220023 is a wasteful number, since it uses less digits than its factorization.

2311221220023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20821812833.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 2311221220023 its reverse (3200221221132), we get a palindrome (5511442441155).

The spelling of 2311221220023 in words is "two trillion, three hundred eleven billion, two hundred twenty-one million, two hundred twenty thousand, twenty-three".