2001142321122 has 16 divisors (see below), whose sum is σ = 4574039591232. Its totient is φ = 571754948880.

The previous prime is 2001142321117. The next prime is 2001142321133. The reversal of 2001142321122 is 2211232411002.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23823122829 + ... + 23823122912.

It is an arithmetic number, because the mean of its divisors is an integer number (285877474452).

Almost surely, 2^{2001142321122} is an apocalyptic number.

2001142321122 is an abundant number, since it is smaller than the sum of its proper divisors (2572897270110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001142321122 is a wasteful number, since it uses less digits than its factorization.

2001142321122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47646245753.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 2001142321122 its reverse (2211232411002), we get a palindrome (4212374732124).

The spelling of 2001142321122 in words is "two trillion, one billion, one hundred forty-two million, three hundred twenty-one thousand, one hundred twenty-two".