221011111002220 has 576 divisors, whose sum is σ = 617296726569600. Its totient is φ = 65641961226240.

The previous prime is 221011111002161. The next prime is 221011111002293. The reversal of 221011111002220 is 22200111110122.

It is a super-2 number, since 2×221011111002220² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221011111002194 and 221011111002203.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 8757411442 + ... + 8757436678.

It is an arithmetic number, because the mean of its divisors is an integer number (1071695705850).

Almost surely, 2^{221011111002220} is an apocalyptic number.

221011111002220 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 221011111002220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308648363284800).

221011111002220 is an abundant number, since it is smaller than the sum of its proper divisors (396285615567380).

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

221011111002220 is a wasteful number, since it uses less digits than its factorization.

221011111002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25666 (or 25657 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221011111002220 its reverse (22200111110122), we get a palindrome (243211222112342).

The spelling of 221011111002220 in words is "two hundred twenty-one trillion, eleven billion, one hundred eleven million, two thousand, two hundred twenty".