22201021020 has 24 divisors (see below), whose sum is σ = 62162859024. Its totient is φ = 5920272256.

The previous prime is 22201021019. The next prime is 22201021043. The reversal of 22201021020 is 2012010222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 22201020987 and 22201021005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185008449 + ... + 185008568.

It is an arithmetic number, because the mean of its divisors is an integer number (2590119126).

Almost surely, 2^22201021020 is an apocalyptic number.

22201021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22201021020 is an abundant number, since it is smaller than the sum of its proper divisors (39961838004).

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

22201021020 is a wasteful number, since it uses less digits than its factorization.

22201021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370017029 (or 370017027 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22201021020 its reverse (2012010222), we get a palindrome (24213031242).

The spelling of 22201021020 in words is "twenty-two billion, two hundred one million, twenty-one thousand, twenty".