20231231111121 has 8 divisors (see below), whose sum is σ = 26975033307040. Its totient is φ = 13487458161312.

The previous prime is 20231231111101. The next prime is 20231231111131. The reversal of 20231231111121 is 12111113213202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20231231111121 - 2⁵ = 20231231111089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20231231111101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5643031 + ... + 8503308.

It is an arithmetic number, because the mean of its divisors is an integer number (3371879163380).

Almost surely, 2^{20231231111121} is an apocalyptic number.

It is an amenable number.

20231231111121 is a deficient number, since it is larger than the sum of its proper divisors (6743802195919).

20231231111121 is a wasteful number, since it uses less digits than its factorization.

20231231111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14623055.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 20231231111121 its reverse (12111113213202), we get a palindrome (32342344324323).

The spelling of 20231231111121 in words is "twenty trillion, two hundred thirty-one billion, two hundred thirty-one million, one hundred eleven thousand, one hundred twenty-one".