221111112020000 has 120 divisors (see below), whose sum is σ = 543977219190636. Its totient is φ = 88442702336000.

The previous prime is 221111112019997. The next prime is 221111112020003. The reversal of 221111112020000 is 20211111122.

It is an interprime number because it is at equal distance from previous prime (221111112019997) and next prime (221111112020003).

It can be written as a sum of positive squares in 10 ways, for example, as 283309223824 + 220827802796176 = 532268^2 + 14860276^2 .

It is not an unprimeable number, because it can be changed into a prime (221111112020003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1610671364 + ... + 1610808636.

Almost surely, 2^{221111112020000} is an apocalyptic number.

221111112020000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221111112020000 is an abundant number, since it is smaller than the sum of its proper divisors (322866107170636).

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

221111112020000 is an equidigital number, since it uses as much as digits as its factorization.

221111112020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217840 (or 217817 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221111112020000 its reverse (20211111122), we get a palindrome (221131323131122).

The spelling of 221111112020000 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred twelve million, twenty thousand".