40121021102201 has 8 divisors (see below), whose sum is σ = 43462917718920. Its totient is φ = 37034788707696.

The previous prime is 40121021102143. The next prime is 40121021102219. The reversal of 40121021102201 is 10220112012104.

It can be written as a sum of positive squares in 4 ways, for example, as 1704267586576 + 38416753515625 = 1305476^2 + 6198125^2 .

It is not a de Polignac number, because 40121021102201 - 2⁴² = 35722974591097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40121021102201.

It is not an unprimeable number, because it can be changed into a prime (40121021107201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9130862870 + ... + 9130867263.

It is an arithmetic number, because the mean of its divisors is an integer number (5432864714865).

Almost surely, 2^{40121021102201} is an apocalyptic number.

It is an amenable number.

40121021102201 is a deficient number, since it is larger than the sum of its proper divisors (3341896616719).

40121021102201 is an equidigital number, since it uses as much as digits as its factorization.

40121021102201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18261730172 (or 18261730146 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 40121021102201 its reverse (10220112012104), we get a palindrome (50341133114305).

The spelling of 40121021102201 in words is "forty trillion, one hundred twenty-one billion, twenty-one million, one hundred two thousand, two hundred one".