22220221021020 has 72 divisors (see below), whose sum is σ = 73528731385200. Its totient is φ = 5386720247040.

The previous prime is 22220221020983. The next prime is 22220221021051. The reversal of 22220221021020 is 2012012202222.

22220221021020 is a `hidden beast` number, since 2 + 2 + 220 + 2 + 210 + 210 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22220221020984 and 22220221021002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5611164945 + ... + 5611168904.

It is an arithmetic number, because the mean of its divisors is an integer number (1021232380350).

Almost surely, 2^{22220221021020} is an apocalyptic number.

22220221021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22220221021020 is an abundant number, since it is smaller than the sum of its proper divisors (51308510364180).

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

22220221021020 is a wasteful number, since it uses less digits than its factorization.

22220221021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11222333875 (or 11222333870 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22220221021020 its reverse (2012012202222), we get a palindrome (24232233223242).

The spelling of 22220221021020 in words is "twenty-two trillion, two hundred twenty billion, two hundred twenty-one million, twenty-one thousand, twenty".