100121102100120 has 64 divisors (see below), whose sum is σ = 316171901376000. Its totient is φ = 25293752108928.

The previous prime is 100121102100067. The next prime is 100121102100143. The reversal of 100121102100120 is 21001201121001.

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

It is a junction number, because it is equal to n+sod(n) for n = 100121102100096 and 100121102100105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21956379760 + ... + 21956384319.

It is an arithmetic number, because the mean of its divisors is an integer number (4940185959000).

Almost surely, 2^{100121102100120} is an apocalyptic number.

100121102100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121102100120 is an abundant number, since it is smaller than the sum of its proper divisors (216050799275880).

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

100121102100120 is a wasteful number, since it uses less digits than its factorization.

100121102100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43912764112 (or 43912764108 counting only the distinct ones).

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

Adding to 100121102100120 its reverse (21001201121001), we get a palindrome (121122303221121).

The spelling of 100121102100120 in words is "one hundred trillion, one hundred twenty-one billion, one hundred two million, one hundred thousand, one hundred twenty".