40221043220 has 12 divisors (see below), whose sum is σ = 84464190804. Its totient is φ = 16088417280.

The previous prime is 40221043211. The next prime is 40221043241. The reversal of 40221043220 is 2234012204.

It can be written as a sum of positive squares in 2 ways, for example, as 28158853636 + 12062189584 = 167806^2 + 109828^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 2011052161 = 40221043220 / (4 + 0 + 2 + 2 + 1 + 0 + 4 + 3 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 40221043192 and 40221043201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005526061 + ... + 1005526100.

It is an arithmetic number, because the mean of its divisors is an integer number (7038682567).

Almost surely, 2^40221043220 is an apocalyptic number.

It is an amenable number.

40221043220 is an abundant number, since it is smaller than the sum of its proper divisors (44243147584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40221043220 is a wasteful number, since it uses less digits than its factorization.

40221043220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011052170 (or 2011052168 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 40221043220 its reverse (2234012204), we get a palindrome (42455055424).

The spelling of 40221043220 in words is "forty billion, two hundred twenty-one million, forty-three thousand, two hundred twenty".