2121023011323 has 16 divisors (see below), whose sum is σ = 2834287013376. Its totient is φ = 1410887496480.

The previous prime is 2121023011301. The next prime is 2121023011337. The reversal of 2121023011323 is 3231103201212.

It is not a de Polignac number, because 2121023011323 - 2⁶ = 2121023011259 is a prime.

It is a super-2 number, since 2×2121023011323² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2121023011323.

It is not an unprimeable number, because it can be changed into a prime (2121023011343) 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, 43961353 + ... + 44009573.

It is an arithmetic number, because the mean of its divisors is an integer number (177142938336).

Almost surely, 2^{2121023011323} is an apocalyptic number.

2121023011323 is a deficient number, since it is larger than the sum of its proper divisors (713264002053).

2121023011323 is a wasteful number, since it uses less digits than its factorization.

2121023011323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80354.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 2121023011323 its reverse (3231103201212), we get a palindrome (5352126212535).

The spelling of 2121023011323 in words is "two trillion, one hundred twenty-one billion, twenty-three million, eleven thousand, three hundred twenty-three".