100121212120122 has 64 divisors (see below), whose sum is σ = 225789101299200. Its totient is φ = 33292138398624.

The previous prime is 100121212120103. The next prime is 100121212120183. The reversal of 100121212120122 is 221021212121001.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 100121212120095 and 100121212120104.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26194018 + ... + 29771949.

It is an arithmetic number, because the mean of its divisors is an integer number (3527954707800).

Almost surely, 2^{100121212120122} is an apocalyptic number.

100121212120122 is an abundant number, since it is smaller than the sum of its proper divisors (125667889179078).

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

100121212120122 is an frugal number, since it uses more digits than its factorization.

100121212120122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55966399 (or 55966381 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 100121212120122 its reverse (221021212121001), we get a palindrome (321142424241123).

The spelling of 100121212120122 in words is "one hundred trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twenty thousand, one hundred twenty-two".