221121101202100 has 36 divisors (see below), whose sum is σ = 523453952302848. Its totient is φ = 80407673164000.

The previous prime is 221121101202037. The next prime is 221121101202103. The reversal of 221121101202100 is 1202101121122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221121101202103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100509590356 + ... + 100509592555.

It is an arithmetic number, because the mean of its divisors is an integer number (14540387563968).

Almost surely, 2^{221121101202100} is an apocalyptic number.

221121101202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221121101202100 is an abundant number, since it is smaller than the sum of its proper divisors (302332851100748).

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

221121101202100 is a wasteful number, since it uses less digits than its factorization.

221121101202100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201019182936 (or 201019182929 counting only the distinct ones).

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

Adding to 221121101202100 its reverse (1202101121122), we get a palindrome (222323202323222).

The spelling of 221121101202100 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, one hundred one million, two hundred two thousand, one hundred".