2123213212331 has 16 divisors (see below), whose sum is σ = 2263567016448. Its totient is φ = 1984611225600.

The previous prime is 2123213212319. The next prime is 2123213212339. The reversal of 2123213212331 is 1332123123212.

It is not a de Polignac number, because 2123213212331 - 2³⁴ = 2106033343147 is a prime.

It is a super-2 number, since 2×2123213212331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2123213212331.

It is not an unprimeable number, because it can be changed into a prime (2123213212339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1457051 + ... + 2523771.

It is an arithmetic number, because the mean of its divisors is an integer number (141472938528).

Almost surely, 2^{2123213212331} is an apocalyptic number.

2123213212331 is a deficient number, since it is larger than the sum of its proper divisors (140353804117).

2123213212331 is a wasteful number, since it uses less digits than its factorization.

2123213212331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067542.

The product of its digits is 2592, while the sum is 26.

Adding to 2123213212331 its reverse (1332123123212), we get a palindrome (3455336335543).

The spelling of 2123213212331 in words is "two trillion, one hundred twenty-three billion, two hundred thirteen million, two hundred twelve thousand, three hundred thirty-one".