221011122000 has 80 divisors (see below), whose sum is σ = 712539876672. Its totient is φ = 58936297600.

The previous prime is 221011121999. The next prime is 221011122019. The reversal of 221011122000 is 221110122.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 18411594 + ... + 18423593.

Almost surely, 2^221011122000 is an apocalyptic number.

221011122000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221011122000 is an abundant number, since it is smaller than the sum of its proper divisors (491528754672).

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

221011122000 is a wasteful number, since it uses less digits than its factorization.

221011122000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36835213 (or 36835197 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221011122000 its reverse (221110122), we get a palindrome (221232232122).

The spelling of 221011122000 in words is "two hundred twenty-one billion, eleven million, one hundred twenty-two thousand".