121899002112 has 432 divisors, whose sum is σ = 391456578240. Its totient is φ = 37695062016.

The previous prime is 121899002111. The next prime is 121899002119. The reversal of 121899002112 is 211200998121.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (121899002111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77199339 + ... + 77200917.

Almost surely, 2^121899002112 is an apocalyptic number.

121899002112 is a gapful number since it is divisible by the number (12) 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 121899002112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195728289120).

121899002112 is an abundant number, since it is smaller than the sum of its proper divisors (269557576128).

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

121899002112 is an equidigital number, since it uses as much as digits as its factorization.

121899002112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700 (or 1674 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The spelling of 121899002112 in words is "one hundred twenty-one billion, eight hundred ninety-nine million, two thousand, one hundred twelve".