221011012021100 has 144 divisors (see below), whose sum is σ = 575244070023168. Its totient is φ = 72061665941760.

The previous prime is 221011012021087. The next prime is 221011012021157. The reversal of 221011012021100 is 1120210110122.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36889244 + ... + 42459843.

It is an arithmetic number, because the mean of its divisors is an integer number (3994750486272).

Almost surely, 2^{221011012021100} is an apocalyptic number.

221011012021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221011012021100 is an abundant number, since it is smaller than the sum of its proper divisors (354233058002068).

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

221011012021100 is a wasteful number, since it uses less digits than its factorization.

221011012021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79349304 (or 79349297 counting only the distinct ones).

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

Adding to 221011012021100 its reverse (1120210110122), we get a palindrome (222131222131222).

The spelling of 221011012021100 in words is "two hundred twenty-one trillion, eleven billion, twelve million, twenty-one thousand, one hundred".