40122615100021 has 4 divisors (see below), whose sum is σ = 42482768929452. Its totient is φ = 37762461270592.

The previous prime is 40122615099997. The next prime is 40122615100039. The reversal of 40122615100021 is 12000151622104.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29410675231921 + 10711939868100 = 5423161^2 + 3272910^2 .

It is a cyclic number.

It is not a de Polignac number, because 40122615100021 - 2⁵ = 40122615099989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40122615100091) 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, 1180076914690 + ... + 1180076914723.

It is an arithmetic number, because the mean of its divisors is an integer number (10620692232363).

Almost surely, 2^{40122615100021} is an apocalyptic number.

It is an amenable number.

40122615100021 is a deficient number, since it is larger than the sum of its proper divisors (2360153829431).

40122615100021 is a wasteful number, since it uses less digits than its factorization.

40122615100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360153829430.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 40122615100021 its reverse (12000151622104), we get a palindrome (52122766722125).

The spelling of 40122615100021 in words is "forty trillion, one hundred twenty-two billion, six hundred fifteen million, one hundred thousand, twenty-one".