121201788 has 48 divisors (see below), whose sum is σ = 300494880. Its totient is φ = 37949184.

The previous prime is 121201777. The next prime is 121201799. The reversal of 121201788 is 887102121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121201777) and next prime (121201799).

It is a congruent number.

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, 8170 + ... + 17582.

It is an arithmetic number, because the mean of its divisors is an integer number (6260310).

Almost surely, 2^121201788 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 121201788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150247440).

121201788 is an abundant number, since it is smaller than the sum of its proper divisors (179293092).

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

121201788 is a wasteful number, since it uses less digits than its factorization.

121201788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9486 (or 9484 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 30.

The square root of 121201788 is about 11009.1683609617. The cubic root of 121201788 is about 494.8835395851.

The spelling of 121201788 in words is "one hundred twenty-one million, two hundred one thousand, seven hundred eighty-eight".