11221021000020 has 96 divisors (see below), whose sum is σ = 34555602590208. Its totient is φ = 2703329436672.

The previous prime is 11221021000019. The next prime is 11221021000031. The reversal of 11221021000020 is 2000012012211.

It is a super-2 number, since 2×11221021000020² (a number of 27 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153005089 + ... + 153078408.

It is an arithmetic number, because the mean of its divisors is an integer number (359954193648).

Almost surely, 2^{11221021000020} is an apocalyptic number.

11221021000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221021000020 is an abundant number, since it is smaller than the sum of its proper divisors (23334581590188).

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

11221021000020 is a wasteful number, since it uses less digits than its factorization.

11221021000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306083569 (or 306083567 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 11221021000020 its reverse (2000012012211), we get a palindrome (13221033012231).

The spelling of 11221021000020 in words is "eleven trillion, two hundred twenty-one billion, twenty-one million, twenty", and thus it is an aban number.