2222222021100 has 144 divisors (see below), whose sum is σ = 7318277329440. Its totient is φ = 578139033600.

The previous prime is 2222222021099. The next prime is 2222222021101. The reversal of 2222222021100 is 11202222222.

It is an interprime number because it is at equal distance from previous prime (2222222021099) and next prime (2222222021101).

It is a super-2 number, since 2×2222222021100² (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 not an unprimeable number, because it can be changed into a prime (2222222021101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9926437 + ... + 10147836.

Almost surely, 2^{2222222021100} is an apocalyptic number.

2222222021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2222222021100 is an abundant number, since it is smaller than the sum of its proper divisors (5096055308340).

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

2222222021100 is a wasteful number, since it uses less digits than its factorization.

2222222021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20074337 (or 20074324 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2222222021100 its reverse (11202222222), we get a palindrome (2233424243322).

The spelling of 2222222021100 in words is "two trillion, two hundred twenty-two billion, two hundred twenty-two million, twenty-one thousand, one hundred".