121200220301100 has 144 divisors (see below), whose sum is σ = 365932018351872. Its totient is φ = 30913762077440.

The previous prime is 121200220301059. The next prime is 121200220301101. The reversal of 121200220301100 is 1103022002121.

It is a super-2 number, since 2×121200220301100² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121200220301100.

It is not an unprimeable number, because it can be changed into a prime (121200220301101) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 208109914 + ... + 208691486.

It is an arithmetic number, because the mean of its divisors is an integer number (2541194571888).

Almost surely, 2^{121200220301100} is an apocalyptic number.

121200220301100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200220301100 is an abundant number, since it is smaller than the sum of its proper divisors (244731798050772).

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

121200220301100 is a wasteful number, since it uses less digits than its factorization.

121200220301100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611816 (or 611809 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121200220301100 its reverse (1103022002121), we get a palindrome (122303242303221).

The spelling of 121200220301100 in words is "one hundred twenty-one trillion, two hundred billion, two hundred twenty million, three hundred one thousand, one hundred".