220012030021 has 12 divisors (see below), whose sum is σ = 256014125388. Its totient is φ = 188521492992.

The previous prime is 220012029983. The next prime is 220012030033. The reversal of 220012030021 is 120030210022.

220012030021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 125944072996 + 94067957025 = 354886^2 + 306705^2 .

It is a de Polignac number, because none of the positive numbers 2^k-220012030021 is a prime.

It is a super-2 number, since 2×220012030021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220012029983 and 220012030010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220012070021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 561946 + ... + 869371.

It is an arithmetic number, because the mean of its divisors is an integer number (21334510449).

Almost surely, 2^220012030021 is an apocalyptic number.

It is an amenable number.

220012030021 is a deficient number, since it is larger than the sum of its proper divisors (36002095367).

220012030021 is a wasteful number, since it uses less digits than its factorization.

220012030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434468 (or 1434461 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 220012030021 its reverse (120030210022), we get a palindrome (340042240043).

The spelling of 220012030021 in words is "two hundred twenty billion, twelve million, thirty thousand, twenty-one".