140340431021 has 12 divisors (see below), whose sum is σ = 164697879132. Its totient is φ = 119227264128.

The previous prime is 140340431017. The next prime is 140340431027. The reversal of 140340431021 is 120134043041.

It can be written as a sum of positive squares in 2 ways, for example, as 9378954025 + 130961476996 = 96845^2 + 361886^2 .

It is not a de Polignac number, because 140340431021 - 2² = 140340431017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140340431027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12667430 + ... + 12678503.

It is an arithmetic number, because the mean of its divisors is an integer number (13724823261).

Almost surely, 2^140340431021 is an apocalyptic number.

It is an amenable number.

140340431021 is a deficient number, since it is larger than the sum of its proper divisors (24357448111).

140340431021 is a wasteful number, since it uses less digits than its factorization.

140340431021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25346060 (or 25346053 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 140340431021 its reverse (120134043041), we get a palindrome (260474474062).

The spelling of 140340431021 in words is "one hundred forty billion, three hundred forty million, four hundred thirty-one thousand, twenty-one".