40473112921 has 2 divisors, whose sum is σ = 40473112922. Its totient is φ = 40473112920.

The previous prime is 40473112913. The next prime is 40473112957. The reversal of 40473112921 is 12921137404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39517066521 + 956046400 = 198789^2 + 30920^2 .

It is a cyclic number.

It is not a de Polignac number, because 40473112921 - 2³ = 40473112913 is a prime.

It is not a weakly prime, because it can be changed into another prime (40473112621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20236556460 + 20236556461.

It is an arithmetic number, because the mean of its divisors is an integer number (20236556461).

Almost surely, 2^40473112921 is an apocalyptic number.

It is an amenable number.

40473112921 is a deficient number, since it is larger than the sum of its proper divisors (1).

40473112921 is an equidigital number, since it uses as much as digits as its factorization.

40473112921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 40473112921 in words is "forty billion, four hundred seventy-three million, one hundred twelve thousand, nine hundred twenty-one".