221020111220200 has 24 divisors (see below), whose sum is σ = 513871758587430. Its totient is φ = 88408044488000.

The previous prime is 221020111220197. The next prime is 221020111220213. The reversal of 221020111220200 is 2022111020122.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 216303908511076 + 4716202709124 = 14707274^2 + 2171682^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 552550277851 + ... + 552550278250.

Almost surely, 2^{221020111220200} is an apocalyptic number.

221020111220200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221020111220200 is an abundant number, since it is smaller than the sum of its proper divisors (292851647367230).

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

221020111220200 is a wasteful number, since it uses less digits than its factorization.

221020111220200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105100556117 (or 1105100556108 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221020111220200 its reverse (2022111020122), we get a palindrome (223042222240322).

The spelling of 221020111220200 in words is "two hundred twenty-one trillion, twenty billion, one hundred eleven million, two hundred twenty thousand, two hundred".