2123210211231 has 16 divisors (see below), whose sum is σ = 2907660888704. Its totient is φ = 1377121816224.

The previous prime is 2123210211197. The next prime is 2123210211259. The reversal of 2123210211231 is 1321120123212.

It is not a de Polignac number, because 2123210211231 - 2¹⁸ = 2123209949087 is a prime.

It is a super-2 number, since 2×2123210211231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123210211198 and 2123210211207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123210212231) 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, 959760 + ... + 2273226.

It is an arithmetic number, because the mean of its divisors is an integer number (181728805544).

Almost surely, 2^{2123210211231} is an apocalyptic number.

2123210211231 is a deficient number, since it is larger than the sum of its proper divisors (784450677473).

2123210211231 is a wasteful number, since it uses less digits than its factorization.

2123210211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328070.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 2123210211231 its reverse (1321120123212), we get a palindrome (3444330334443).

The spelling of 2123210211231 in words is "two trillion, one hundred twenty-three billion, two hundred ten million, two hundred eleven thousand, two hundred thirty-one".