121230978 has 64 divisors (see below), whose sum is σ = 282175488. Its totient is φ = 34315520.

The previous prime is 121230971. The next prime is 121230979. The reversal of 121230978 is 879032121.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121230971) 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, 187051 + ... + 187697.

It is an arithmetic number, because the mean of its divisors is an integer number (4408992).

Almost surely, 2^121230978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121230978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141087744).

121230978 is an abundant number, since it is smaller than the sum of its proper divisors (160944510).

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

121230978 is a wasteful number, since it uses less digits than its factorization.

121230978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 121230978 is about 11010.4939943674. The cubic root of 121230978 is about 494.9232653218.

The spelling of 121230978 in words is "one hundred twenty-one million, two hundred thirty thousand, nine hundred seventy-eight".