221121111101000 has 64 divisors (see below), whose sum is σ = 564461890911360. Its totient is φ = 80407676760000.

The previous prime is 221121111100999. The next prime is 221121111101027. The reversal of 221121111101000 is 101111121122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10050948596 + ... + 10050970595.

It is an arithmetic number, because the mean of its divisors is an integer number (8819717045490).

Almost surely, 2^{221121111101000} is an apocalyptic number.

221121111101000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221121111101000 is an abundant number, since it is smaller than the sum of its proper divisors (343340779810360).

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

221121111101000 is a wasteful number, since it uses less digits than its factorization.

221121111101000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20101919223 (or 20101919209 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 221121111101000 its reverse (101111121122), we get a palindrome (221222222222122).

The spelling of 221121111101000 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, one hundred eleven million, one hundred one thousand".