221010220212100 has 72 divisors (see below), whose sum is σ = 528371580554496. Its totient is φ = 79571636400000.

The previous prime is 221010220212059. The next prime is 221010220212101. The reversal of 221010220212100 is 1212022010122.

It is a happy number.

221010220212100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221010220212101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 994534356 + ... + 994756555.

It is an arithmetic number, because the mean of its divisors is an integer number (7338494174368).

Almost surely, 2^{221010220212100} is an apocalyptic number.

221010220212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221010220212100 is an abundant number, since it is smaller than the sum of its proper divisors (307361360342396).

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

221010220212100 is a wasteful number, since it uses less digits than its factorization.

221010220212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989291037 (or 1989291030 counting only the distinct ones).

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

Adding to 221010220212100 its reverse (1212022010122), we get a palindrome (222222242222222).

The spelling of 221010220212100 in words is "two hundred twenty-one trillion, ten billion, two hundred twenty million, two hundred twelve thousand, one hundred".