101212121200 has 30 divisors (see below), whose sum is σ = 243162122144. Its totient is φ = 40484848320.

The previous prime is 101212121177. The next prime is 101212121203. The reversal of 101212121200 is 2121212101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101212121203) 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, 126514752 + ... + 126515551.

Almost surely, 2^101212121200 is an apocalyptic number.

101212121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101212121200 is an abundant number, since it is smaller than the sum of its proper divisors (141950000944).

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

101212121200 is a wasteful number, since it uses less digits than its factorization.

101212121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253030321 (or 253030310 counting only the distinct ones).

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

Adding to 101212121200 its reverse (2121212101), we get a palindrome (103333333301).

Subtracting from 101212121200 its reverse (2121212101), we obtain a palindrome (99090909099).

The spelling of 101212121200 in words is "one hundred one billion, two hundred twelve million, one hundred twenty-one thousand, two hundred".