2221221311100 has 108 divisors (see below), whose sum is σ = 7595230723080. Its totient is φ = 538477891200.

The previous prime is 2221221311093. The next prime is 2221221311117. The reversal of 2221221311100 is 11131221222.

2221221311100 is a `hidden beast` number, since 22 + 212 + 21 + 311 + 100 = 666.

It is a super-2 number, since 2×2221221311100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 112172995 + ... + 112192794.

Almost surely, 2^{2221221311100} is an apocalyptic number.

2221221311100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221221311100 is an abundant number, since it is smaller than the sum of its proper divisors (5374009411980).

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

2221221311100 is a wasteful number, since it uses less digits than its factorization.

2221221311100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224365820 (or 224365810 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2221221311100 its reverse (11131221222), we get a palindrome (2232352532322).

It can be divided in two parts, 22212 and 21311100, that added together give a palindrome (21333312).

The spelling of 2221221311100 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-one million, three hundred eleven thousand, one hundred".