100121110212 has 24 divisors (see below), whose sum is σ = 235683324576. Its totient is φ = 33078360448.

The previous prime is 100121110183. The next prime is 100121110213. The reversal of 100121110212 is 212011121001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (100121110213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36916458 + ... + 36919169.

It is an arithmetic number, because the mean of its divisors is an integer number (9820138524).

Almost surely, 2^100121110212 is an apocalyptic number.

100121110212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100121110212 is an abundant number, since it is smaller than the sum of its proper divisors (135562214364).

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

100121110212 is a wasteful number, since it uses less digits than its factorization.

100121110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73835747 (or 73835745 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 100121110212 its reverse (212011121001), we get a palindrome (312132231213).

The spelling of 100121110212 in words is "one hundred billion, one hundred twenty-one million, one hundred ten thousand, two hundred twelve".