222122100100 has 18 divisors (see below), whose sum is σ = 482004957434. Its totient is φ = 88848840000.

The previous prime is 222122100089. The next prime is 222122100107. The reversal of 222122100100 is 1001221222.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 514654596 + 221607445504 = 22686^2 + 470752^2 .

It is not an unprimeable number, because it can be changed into a prime (222122100107) 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 5 ways as a sum of consecutive naturals, for example, 1110610401 + ... + 1110610600.

Almost surely, 2^222122100100 is an apocalyptic number.

222122100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222122100100 is an abundant number, since it is smaller than the sum of its proper divisors (259882857334).

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

222122100100 is a wasteful number, since it uses less digits than its factorization.

222122100100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221221015 (or 2221221008 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 222122100100 its reverse (1001221222), we get a palindrome (223123321322).

The spelling of 222122100100 in words is "two hundred twenty-two billion, one hundred twenty-two million, one hundred thousand, one hundred".