240402224212121 has 2 divisors, whose sum is σ = 240402224212122. Its totient is φ = 240402224212120.

The previous prime is 240402224212103. The next prime is 240402224212133. The reversal of 240402224212121 is 121212422204042.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174085224786496 + 66316999425625 = 13194136^2 + 8143525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240402224212121 is a prime.

It is a super-2 number, since 2×240402224212121² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (240402224212921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120201112106060 + 120201112106061.

It is an arithmetic number, because the mean of its divisors is an integer number (120201112106061).

Almost surely, 2^{240402224212121} is an apocalyptic number.

It is an amenable number.

240402224212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

240402224212121 is an equidigital number, since it uses as much as digits as its factorization.

240402224212121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8192, while the sum is 29.

Adding to 240402224212121 its reverse (121212422204042), we get a palindrome (361614646416163).

The spelling of 240402224212121 in words is "two hundred forty trillion, four hundred two billion, two hundred twenty-four million, two hundred twelve thousand, one hundred twenty-one".