121201321120 has 96 divisors (see below), whose sum is σ = 317663519040. Its totient is φ = 43326167040.

The previous prime is 121201321099. The next prime is 121201321217. The reversal of 121201321120 is 21123102121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 121201321094 and 121201321103.

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, 479757 + ... + 687436.

It is an arithmetic number, because the mean of its divisors is an integer number (3308994990).

Almost surely, 2^121201321120 is an apocalyptic number.

121201321120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201321120 is an abundant number, since it is smaller than the sum of its proper divisors (196462197920).

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

121201321120 is a wasteful number, since it uses less digits than its factorization.

121201321120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167278 (or 1167270 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121201321120 its reverse (21123102121), we get a palindrome (142324423241).

The spelling of 121201321120 in words is "one hundred twenty-one billion, two hundred one million, three hundred twenty-one thousand, one hundred twenty".