121213788 has 24 divisors (see below), whose sum is σ = 284417280. Its totient is φ = 40178160.

The previous prime is 121213759. The next prime is 121213801. The reversal of 121213788 is 887312121.

It is a super-3 number, since 3×121213788³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26068 + ... + 30363.

It is an arithmetic number, because the mean of its divisors is an integer number (11850720).

Almost surely, 2^121213788 is an apocalyptic number.

It is an amenable number.

121213788 is an abundant number, since it is smaller than the sum of its proper divisors (163203492).

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

121213788 is a wasteful number, since it uses less digits than its factorization.

121213788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56617 (or 56615 counting only the distinct ones).

The product of its digits is 5376, while the sum is 33.

The square root of 121213788 is about 11009.7133477671. The cubic root of 121213788 is about 494.8998715952.

The spelling of 121213788 in words is "one hundred twenty-one million, two hundred thirteen thousand, seven hundred eighty-eight".