2220120330021 has 36 divisors (see below), whose sum is σ = 3646421682540. Its totient is φ = 1299129955200.

The previous prime is 2220120329969. The next prime is 2220120330041. The reversal of 2220120330021 is 1200330210222.

2220120330021 is a `hidden beast` number, since 2 + 220 + 120 + 3 + 300 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 559076225796 + 1661044104225 = 747714^2 + 1288815^2 .

It is not a de Polignac number, because 2220120330021 - 2⁷ = 2220120329893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2220120329976 and 2220120330003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220120330041) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 35118040 + ... + 35181201.

Almost surely, 2^{2220120330021} is an apocalyptic number.

It is an amenable number.

2220120330021 is a deficient number, since it is larger than the sum of its proper divisors (1426301352519).

2220120330021 is a wasteful number, since it uses less digits than its factorization.

2220120330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70299298 (or 70299284 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 2220120330021 its reverse (1200330210222), we get a palindrome (3420450540243).

The spelling of 2220120330021 in words is "two trillion, two hundred twenty billion, one hundred twenty million, three hundred thirty thousand, twenty-one".