1212100122100 has 72 divisors (see below), whose sum is σ = 3069966009600. Its totient is φ = 406735105920.

The previous prime is 1212100122071. The next prime is 1212100122131. The reversal of 1212100122100 is 12210012121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18388075 + ... + 18453874.

It is an arithmetic number, because the mean of its divisors is an integer number (42638416800).

Almost surely, 2^{1212100122100} is an apocalyptic number.

1212100122100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212100122100 is an abundant number, since it is smaller than the sum of its proper divisors (1857865887500).

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

1212100122100 is a wasteful number, since it uses less digits than its factorization.

1212100122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36842017 (or 36842010 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1212100122100 its reverse (12210012121), we get a palindrome (1224310134221).

The spelling of 1212100122100 in words is "one trillion, two hundred twelve billion, one hundred million, one hundred twenty-two thousand, one hundred".