4023121431 has 16 divisors (see below), whose sum is σ = 6255584000. Its totient is φ = 2298925944.

The previous prime is 4023121423. The next prime is 4023121457. The reversal of 4023121431 is 1341213204.

It is not a de Polignac number, because 4023121431 - 2³ = 4023121423 is a prime.

It is a super-2 number, since 2×4023121431² = 32371012097142975522, which contains 22 as substring.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4023121398 and 4023121407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4023121411) 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, 1953841 + ... + 1955898.

It is an arithmetic number, because the mean of its divisors is an integer number (390974000).

Almost surely, 2^4023121431 is an apocalyptic number.

4023121431 is a deficient number, since it is larger than the sum of its proper divisors (2232462569).

4023121431 is an equidigital number, since it uses as much as digits as its factorization.

4023121431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3909763 (or 3909749 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 4023121431 is about 63428.0807765772. The cubic root of 4023121431 is about 1590.4537595789.

Adding to 4023121431 its reverse (1341213204), we get a palindrome (5364334635).

The spelling of 4023121431 in words is "four billion, twenty-three million, one hundred twenty-one thousand, four hundred thirty-one".