40121127521867 has 4 divisors (see below), whose sum is σ = 45852717167856. Its totient is φ = 34389537875880.

The previous prime is 40121127521809. The next prime is 40121127521971. The reversal of 40121127521867 is 76812572112104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40121127521867 - 2²² = 40121123327563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40121127521567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2865794822984 + ... + 2865794822997.

It is an arithmetic number, because the mean of its divisors is an integer number (11463179291964).

Almost surely, 2^{40121127521867} is an apocalyptic number.

40121127521867 is a deficient number, since it is larger than the sum of its proper divisors (5731589645989).

40121127521867 is an equidigital number, since it uses as much as digits as its factorization.

40121127521867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5731589645988.

The product of its (nonzero) digits is 376320, while the sum is 47.

The spelling of 40121127521867 in words is "forty trillion, one hundred twenty-one billion, one hundred twenty-seven million, five hundred twenty-one thousand, eight hundred sixty-seven".