121111120120 has 128 divisors (see below), whose sum is σ = 291188520000. Its totient is φ = 45201162240.

The previous prime is 121111120093. The next prime is 121111120127. The reversal of 121111120120 is 21021111121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121111120120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111120127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58197480 + ... + 58199560.

Almost surely, 2^121111120120 is an apocalyptic number.

121111120120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121111120120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145594260000).

121111120120 is an abundant number, since it is smaller than the sum of its proper divisors (170077399880).

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

121111120120 is a wasteful number, since it uses less digits than its factorization.

121111120120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233 (or 3229 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121111120120 its reverse (21021111121), we get a palindrome (142132231241).

The spelling of 121111120120 in words is "one hundred twenty-one billion, one hundred eleven million, one hundred twenty thousand, one hundred twenty".