40020201320021 has 32 divisors (see below), whose sum is σ = 45909130726368. Its totient is φ = 34559171665920.

The previous prime is 40020201320017. The next prime is 40020201320023. The reversal of 40020201320021 is 12002310202004.

It can be written as a sum of positive squares in 16 ways, for example, as 16230536493796 + 23789664826225 = 4028714^2 + 4877465^2 .

It is a cyclic number.

It is not a de Polignac number, because 40020201320021 - 2² = 40020201320017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40020201320023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79470995 + ... + 79972991.

It is an arithmetic number, because the mean of its divisors is an integer number (1434660335199).

Almost surely, 2^{40020201320021} is an apocalyptic number.

It is an amenable number.

40020201320021 is a deficient number, since it is larger than the sum of its proper divisors (5888929406347).

40020201320021 is a wasteful number, since it uses less digits than its factorization.

40020201320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504201.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 40020201320021 its reverse (12002310202004), we get a palindrome (52022511522025).

The spelling of 40020201320021 in words is "forty trillion, twenty billion, two hundred one million, three hundred twenty thousand, twenty-one".