2222121222100 has 36 divisors (see below), whose sum is σ = 5192926366684. Its totient is φ = 820475527680.

The previous prime is 2222121222077. The next prime is 2222121222137. The reversal of 2222121222100 is 12221212222.

It can be written as a sum of positive squares in 6 ways, for example, as 521324432784 + 1700796789316 = 722028^2 + 1304146^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 854660709 + ... + 854663308.

Almost surely, 2^{2222121222100} is an apocalyptic number.

2222121222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2222121222100 is an abundant number, since it is smaller than the sum of its proper divisors (2970805144584).

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

2222121222100 is a wasteful number, since it uses less digits than its factorization.

2222121222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709324044 (or 1709324037 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2222121222100 its reverse (12221212222), we get a palindrome (2234342434322).

The spelling of 2222121222100 in words is "two trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred".