2221111021100 has 36 divisors (see below), whose sum is σ = 4922360094624. Its totient is φ = 869541334080.

The previous prime is 2221111021093. The next prime is 2221111021139. The reversal of 2221111021100 is 11201111222.

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, 236283707 + ... + 236293106.

Almost surely, 2^{2221111021100} is an apocalyptic number.

2221111021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221111021100 is an abundant number, since it is smaller than the sum of its proper divisors (2701249073524).

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

2221111021100 is a wasteful number, since it uses less digits than its factorization.

2221111021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472576874 (or 472576867 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2221111021100 its reverse (11201111222), we get a palindrome (2232312132322).

The spelling of 2221111021100 in words is "two trillion, two hundred twenty-one billion, one hundred eleven million, twenty-one thousand, one hundred".