40204706121 has 24 divisors (see below), whose sum is σ = 61540361064. Its totient is φ = 25205637120.

The previous prime is 40204706107. The next prime is 40204706137. The reversal of 40204706121 is 12160740204.

40204706121 is a `hidden beast` number, since 4 + 0 + 2 + 0 + 47 + 0 + 612 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 20509390521 + 19695315600 = 143211^2 + 140340^2 .

It is not a de Polignac number, because 40204706121 - 2⁶ = 40204706057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40204707121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78241 + ... + 294161.

It is an arithmetic number, because the mean of its divisors is an integer number (2564181711).

Almost surely, 2^40204706121 is an apocalyptic number.

It is an amenable number.

40204706121 is a deficient number, since it is larger than the sum of its proper divisors (21335654943).

40204706121 is a wasteful number, since it uses less digits than its factorization.

40204706121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217161 (or 217158 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The spelling of 40204706121 in words is "forty billion, two hundred four million, seven hundred six thousand, one hundred twenty-one".