2140431121 has 4 divisors (see below), whose sum is σ = 2266338852. Its totient is φ = 2014523392.

The previous prime is 2140431113. The next prime is 2140431127. The reversal of 2140431121 is 1211340412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1401678721 + 738752400 = 37439^2 + 27180^2 .

It is not a de Polignac number, because 2140431121 - 2³ = 2140431113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2140431127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62953840 + ... + 62953873.

It is an arithmetic number, because the mean of its divisors is an integer number (566584713).

Almost surely, 2^2140431121 is an apocalyptic number.

It is an amenable number.

2140431121 is a deficient number, since it is larger than the sum of its proper divisors (125907731).

2140431121 is a wasteful number, since it uses less digits than its factorization.

2140431121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125907730.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 2140431121 is about 46264.7935367705. The cubic root of 2140431121 is about 1288.7452737792.

Adding to 2140431121 its reverse (1211340412), we get a palindrome (3351771533).

It can be divided in two parts, 21404 and 31121, that added together give a palindrome (52525).

The spelling of 2140431121 in words is "two billion, one hundred forty million, four hundred thirty-one thousand, one hundred twenty-one".