221001111121100 has 36 divisors (see below), whose sum is σ = 483348571878144. Its totient is φ = 87704377951680.

The previous prime is 221001111121069. The next prime is 221001111121183. The reversal of 221001111121100 is 1121111100122.

It is a super-2 number, since 2×221001111121100² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8700818447 + ... + 8700843846.

Almost surely, 2^{221001111121100} is an apocalyptic number.

221001111121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221001111121100 is an abundant number, since it is smaller than the sum of its proper divisors (262347460757044).

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

221001111121100 is a wasteful number, since it uses less digits than its factorization.

221001111121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17401662434 (or 17401662427 counting only the distinct ones).

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

Adding to 221001111121100 its reverse (1121111100122), we get a palindrome (222122222221222).

The spelling of 221001111121100 in words is "two hundred twenty-one trillion, one billion, one hundred eleven million, one hundred twenty-one thousand, one hundred".