2221111220100 has 72 divisors (see below), whose sum is σ = 6507762226560. Its totient is φ = 584798897280.

The previous prime is 2221111220093. The next prime is 2221111220161. The reversal of 2221111220100 is 10221111222.

It is a super-2 number, since 2×2221111220100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2221111220100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46835187 + ... + 46882586.

It is an arithmetic number, because the mean of its divisors is an integer number (90385586480).

Almost surely, 2^{2221111220100} is an apocalyptic number.

2221111220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221111220100 is an abundant number, since it is smaller than the sum of its proper divisors (4286651006460).

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

2221111220100 is a wasteful number, since it uses less digits than its factorization.

2221111220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93717869 (or 93717862 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2221111220100 its reverse (10221111222), we get a palindrome (2231332331322).

The spelling of 2221111220100 in words is "two trillion, two hundred twenty-one billion, one hundred eleven million, two hundred twenty thousand, one hundred".