1212112122100 has 36 divisors (see below), whose sum is σ = 2869399971648. Its totient is φ = 440768044000.

The previous prime is 1212112122097. The next prime is 1212112122113. The reversal of 1212112122100 is 12212112121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 550958956 + ... + 550961155.

It is an arithmetic number, because the mean of its divisors is an integer number (79705554768).

Almost surely, 2^{1212112122100} is an apocalyptic number.

1212112122100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212112122100 is an abundant number, since it is smaller than the sum of its proper divisors (1657287849548).

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

1212112122100 is a wasteful number, since it uses less digits than its factorization.

1212112122100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101920136 (or 1101920129 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212112122100 its reverse (12212112121), we get a palindrome (1224324234221).

The spelling of 1212112122100 in words is "one trillion, two hundred twelve billion, one hundred twelve million, one hundred twenty-two thousand, one hundred".