221112211000000 has 196 divisors, whose sum is σ = 567367221981600. Its totient is φ = 85395049600000.

The previous prime is 221112210999899. The next prime is 221112211000049. The reversal of 221112211000000 is 112211122.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 25187721 + ... + 32812279.

Almost surely, 2^{221112211000000} is an apocalyptic number.

221112211000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221112211000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283683610990800).

221112211000000 is an abundant number, since it is smaller than the sum of its proper divisors (346255010981600).

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

221112211000000 is an frugal number, since it uses more digits than its factorization.

221112211000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7624630 (or 7624595 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221112211000000 its reverse (112211122), we get a palindrome (221112323211122).

The spelling of 221112211000000 in words is "two hundred twenty-one trillion, one hundred twelve billion, two hundred eleven million", and thus it is an aban number.