2123313312021 has 48 divisors (see below), whose sum is σ = 3166558789632. Its totient is φ = 1264334401440.

The previous prime is 2123313311989. The next prime is 2123313312041. The reversal of 2123313312021 is 1202133133212.

It is not a de Polignac number, because 2123313312021 - 2⁵ = 2123313311989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2123313311982 and 2123313312000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123313312041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9200970 + ... + 9428916.

It is an arithmetic number, because the mean of its divisors is an integer number (65969974784).

Almost surely, 2^{2123313312021} is an apocalyptic number.

It is an amenable number.

2123313312021 is a deficient number, since it is larger than the sum of its proper divisors (1043245477611).

2123313312021 is a wasteful number, since it uses less digits than its factorization.

2123313312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228422 (or 228411 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 2123313312021 its reverse (1202133133212), we get a palindrome (3325446445233).

The spelling of 2123313312021 in words is "two trillion, one hundred twenty-three billion, three hundred thirteen million, three hundred twelve thousand, twenty-one".