2021220244 has 12 divisors (see below), whose sum is σ = 3537450868. Its totient is φ = 1010520000.

The previous prime is 2021220241. The next prime is 2021220281. The reversal of 2021220244 is 4420221202.

It can be written as a sum of positive squares in 2 ways, for example, as 1409251600 + 611968644 = 37540^2 + 24738^2 .

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021220241) 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, 71974 + ... + 96034.

Almost surely, 2^2021220244 is an apocalyptic number.

It is an amenable number.

2021220244 is a deficient number, since it is larger than the sum of its proper divisors (1516230624).

2021220244 is a wasteful number, since it uses less digits than its factorization.

2021220244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45066 (or 45064 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 2021220244 is about 44957.9830953302. The cubic root of 2021220244 is about 1264.3613546849.

Adding to 2021220244 its reverse (4420221202), we get a palindrome (6441441446).

The spelling of 2021220244 in words is "two billion, twenty-one million, two hundred twenty thousand, two hundred forty-four".