221102111000020 has 96 divisors (see below), whose sum is σ = 483199570022400. Its totient is φ = 84913902240384.

The previous prime is 221102110999967. The next prime is 221102111000039. The reversal of 221102111000020 is 20000111201122.

It is a super-2 number, since 2×221102111000020² (a number of 29 digits) contains 22 as substring.

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, 748724037 + ... + 749019283.

It is an arithmetic number, because the mean of its divisors is an integer number (5033328854400).

Almost surely, 2^{221102111000020} is an apocalyptic number.

221102111000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221102111000020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241599785011200).

221102111000020 is an abundant number, since it is smaller than the sum of its proper divisors (262097459022380).

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

221102111000020 is a wasteful number, since it uses less digits than its factorization.

221102111000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310117 (or 310115 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221102111000020 its reverse (20000111201122), we get a palindrome (241102222201142).

The spelling of 221102111000020 in words is "two hundred twenty-one trillion, one hundred two billion, one hundred eleven million, twenty", and thus it is an aban number.