22220021000020 has 24 divisors (see below), whose sum is σ = 46667520580968. Its totient is φ = 8886965260800.

The previous prime is 22220020999999. The next prime is 22220021000117. The reversal of 22220021000020 is 2000012002222.

It can be written as a sum of positive squares in 4 ways, for example, as 529000200976 + 21691020799044 = 727324^2 + 4657362^2 .

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, 65021521 + ... + 65362360.

It is an arithmetic number, because the mean of its divisors is an integer number (1944480024207).

Almost surely, 2^{22220021000020} is an apocalyptic number.

22220021000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22220021000020 is an abundant number, since it is smaller than the sum of its proper divisors (24447499580948).

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

22220021000020 is a wasteful number, since it uses less digits than its factorization.

22220021000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130392411 (or 130392409 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 22220021000020 its reverse (2000012002222), we get a palindrome (24220033002242).

The spelling of 22220021000020 in words is "twenty-two trillion, two hundred twenty billion, twenty-one million, twenty", and thus it is an aban number.