22220111012020 has 12 divisors (see below), whose sum is σ = 46662233125284. Its totient is φ = 8888044404800.

The previous prime is 22220111011997. The next prime is 22220111012023. The reversal of 22220111012020 is 2021011102222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11848658227344 + 10371452784676 = 3442188^2 + 3220474^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22220111011985 and 22220111012003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220111012023) 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, 555502775281 + ... + 555502775320.

It is an arithmetic number, because the mean of its divisors is an integer number (3888519427107).

Almost surely, 2^{22220111012020} is an apocalyptic number.

22220111012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22220111012020 is an abundant number, since it is smaller than the sum of its proper divisors (24442122113264).

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

22220111012020 is a wasteful number, since it uses less digits than its factorization.

22220111012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111005550610 (or 1111005550608 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22220111012020 its reverse (2021011102222), we get a palindrome (24241122114242).

The spelling of 22220111012020 in words is "twenty-two trillion, two hundred twenty billion, one hundred eleven million, twelve thousand, twenty".