240122221021 has 2 divisors, whose sum is σ = 240122221022. Its totient is φ = 240122221020.

The previous prime is 240122220977. The next prime is 240122221043. The reversal of 240122221021 is 120122221042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236925562500 + 3196658521 = 486750^2 + 56539^2 .

It is a cyclic number.

It is not a de Polignac number, because 240122221021 - 2⁷ = 240122220893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240122221021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240122221051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120061110510 + 120061110511.

It is an arithmetic number, because the mean of its divisors is an integer number (120061110511).

Almost surely, 2^240122221021 is an apocalyptic number.

It is an amenable number.

240122221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

240122221021 is an equidigital number, since it uses as much as digits as its factorization.

240122221021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 240122221021 its reverse (120122221042), we get a palindrome (360244442063).

The spelling of 240122221021 in words is "two hundred forty billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty-one".