121200023120 has 80 divisors (see below), whose sum is σ = 312617759040. Its totient is φ = 43325721600.

The previous prime is 121200023111. The next prime is 121200023141. The reversal of 121200023120 is 21320002121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 121200023095 and 121200023104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1115261 + ... + 1219100.

It is an arithmetic number, because the mean of its divisors is an integer number (3907721988).

Almost surely, 2^121200023120 is an apocalyptic number.

121200023120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200023120 is an abundant number, since it is smaller than the sum of its proper divisors (191417735920).

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

121200023120 is a wasteful number, since it uses less digits than its factorization.

121200023120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334444 (or 2334438 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 121200023120 its reverse (21320002121), we get a palindrome (142520025241).

The spelling of 121200023120 in words is "one hundred twenty-one billion, two hundred million, twenty-three thousand, one hundred twenty".