2123111431 has 16 divisors (see below), whose sum is σ = 2520555840. Its totient is φ = 1749726720.

The previous prime is 2123111429. The next prime is 2123111443. The reversal of 2123111431 is 1341113212.

It is not a de Polignac number, because 2123111431 - 2¹ = 2123111429 is a prime.

It is a super-2 number, since 2×2123111431² = 9015204296885735522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123111399 and 2123111408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123111411) 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, 27225 + ... + 70621.

It is an arithmetic number, because the mean of its divisors is an integer number (157534740).

Almost surely, 2^2123111431 is an apocalyptic number.

2123111431 is a deficient number, since it is larger than the sum of its proper divisors (397444409).

2123111431 is a wasteful number, since it uses less digits than its factorization.

2123111431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43674.

The product of its digits is 144, while the sum is 19.

The square root of 2123111431 is about 46077.2333262317. The cubic root of 2123111431 is about 1285.2598163490.

Adding to 2123111431 its reverse (1341113212), we get a palindrome (3464224643).

The spelling of 2123111431 in words is "two billion, one hundred twenty-three million, one hundred eleven thousand, four hundred thirty-one".