121035871788 has 192 divisors, whose sum is σ = 330671480832. Its totient is φ = 34116526080.

The previous prime is 121035871787. The next prime is 121035871849. The reversal of 121035871788 is 887178530121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 121035871788.

It is not an unprimeable number, because it can be changed into a prime (121035871787) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35691573 + ... + 35694963.

It is an arithmetic number, because the mean of its divisors is an integer number (1722247296).

Almost surely, 2^121035871788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121035871788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165335740416).

121035871788 is an abundant number, since it is smaller than the sum of its proper divisors (209635609044).

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

121035871788 is a wasteful number, since it uses less digits than its factorization.

121035871788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3784 (or 3782 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 51.

The spelling of 121035871788 in words is "one hundred twenty-one billion, thirty-five million, eight hundred seventy-one thousand, seven hundred eighty-eight".