2221002312123 has 32 divisors (see below), whose sum is σ = 3468494633472. Its totient is φ = 1237694976000.

The previous prime is 2221002312103. The next prime is 2221002312143. The reversal of 2221002312123 is 3212132001222.

It is an interprime number because it is at equal distance from previous prime (2221002312103) and next prime (2221002312143).

It is not a de Polignac number, because 2221002312123 - 2¹⁸ = 2221002049979 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 2221002312123.

It is not an unprimeable number, because it can be changed into a prime (2221002312103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1339728 + ... + 2497373.

It is an arithmetic number, because the mean of its divisors is an integer number (108390457296).

Almost surely, 2^{2221002312123} is an apocalyptic number.

2221002312123 is a deficient number, since it is larger than the sum of its proper divisors (1247492321349).

2221002312123 is a wasteful number, since it uses less digits than its factorization.

2221002312123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837795.

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

Adding to 2221002312123 its reverse (3212132001222), we get a palindrome (5433134313345).

The spelling of 2221002312123 in words is "two trillion, two hundred twenty-one billion, two million, three hundred twelve thousand, one hundred twenty-three".