240131430221 has 2 divisors, whose sum is σ = 240131430222. Its totient is φ = 240131430220.

The previous prime is 240131430181. The next prime is 240131430257. The reversal of 240131430221 is 122034131042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200691456196 + 39439974025 = 447986^2 + 198595^2 .

It is a cyclic number.

It is not a de Polignac number, because 240131430221 - 2²² = 240127235917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240131430271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120065715110 + 120065715111.

It is an arithmetic number, because the mean of its divisors is an integer number (120065715111).

Almost surely, 2^240131430221 is an apocalyptic number.

It is an amenable number.

240131430221 is a deficient number, since it is larger than the sum of its proper divisors (1).

240131430221 is an equidigital number, since it uses as much as digits as its factorization.

240131430221 is an evil number, because the sum of its binary digits is even.

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

Adding to 240131430221 its reverse (122034131042), we get a palindrome (362165561263).

The spelling of 240131430221 in words is "two hundred forty billion, one hundred thirty-one million, four hundred thirty thousand, two hundred twenty-one".