12140440442 has 16 divisors (see below), whose sum is σ = 19981510920. Its totient is φ = 5497557312.

The previous prime is 12140440409. The next prime is 12140440447. The reversal of 12140440442 is 24404404121.

It can be written as a sum of positive squares in 4 ways, for example, as 9682363201 + 2458077241 = 98399^2 + 49579^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (12140440447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4403717 + ... + 4406472.

Almost surely, 2^12140440442 is an apocalyptic number.

12140440442 is a deficient number, since it is larger than the sum of its proper divisors (7841070478).

12140440442 is a wasteful number, since it uses less digits than its factorization.

12140440442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8810257.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 12140440442 its reverse (24404404121), we get a palindrome (36544844563).

The spelling of 12140440442 in words is "twelve billion, one hundred forty million, four hundred forty thousand, four hundred forty-two".