20231121031 has 24 divisors (see below), whose sum is σ = 23486163120. Its totient is φ = 17279616000.

The previous prime is 20231120989. The next prime is 20231121047. The reversal of 20231121031 is 13012113202.

It is not a de Polignac number, because 20231121031 - 2¹⁵ = 20231088263 is a prime.

It is a super-2 number, since 2×20231121031² (a number of 21 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 = 20231120996 and 20231121014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231121061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1905285 + ... + 1915873.

It is an arithmetic number, because the mean of its divisors is an integer number (978590130).

Almost surely, 2^20231121031 is an apocalyptic number.

20231121031 is a deficient number, since it is larger than the sum of its proper divisors (3255042089).

20231121031 is a wasteful number, since it uses less digits than its factorization.

20231121031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11235 (or 11218 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20231121031 its reverse (13012113202), we get a palindrome (33243234233).

The spelling of 20231121031 in words is "twenty billion, two hundred thirty-one million, one hundred twenty-one thousand, thirty-one".