121131102000 has 160 divisors (see below), whose sum is σ = 390884981760. Its totient is φ = 32271993600.

The previous prime is 121131101999. The next prime is 121131102011. The reversal of 121131102000 is 201131121.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6969321 + ... + 6986679.

It is an arithmetic number, because the mean of its divisors is an integer number (2443031136).

Almost surely, 2^121131102000 is an apocalyptic number.

121131102000 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 121131102000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195442490880).

121131102000 is an abundant number, since it is smaller than the sum of its proper divisors (269753879760).

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

121131102000 is a wasteful number, since it uses less digits than its factorization.

121131102000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18548 (or 18532 counting only the distinct ones).

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

Adding to 121131102000 its reverse (201131121), we get a palindrome (121332233121).

The spelling of 121131102000 in words is "one hundred twenty-one billion, one hundred thirty-one million, one hundred two thousand".