40215063121 has 2 divisors, whose sum is σ = 40215063122. Its totient is φ = 40215063120.

The previous prime is 40215063067. The next prime is 40215063151. The reversal of 40215063121 is 12136051204.

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., 39720490000 + 494573121 = 199300^2 + 22239^2 .

It is a cyclic number.

It is not a de Polignac number, because 40215063121 - 2¹⁵ = 40215030353 is a prime.

It is not a weakly prime, because it can be changed into another prime (40215063151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20107531560 + 20107531561.

It is an arithmetic number, because the mean of its divisors is an integer number (20107531561).

Almost surely, 2^40215063121 is an apocalyptic number.

It is an amenable number.

40215063121 is a deficient number, since it is larger than the sum of its proper divisors (1).

40215063121 is an equidigital number, since it uses as much as digits as its factorization.

40215063121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The spelling of 40215063121 in words is "forty billion, two hundred fifteen million, sixty-three thousand, one hundred twenty-one".