121316988 has 72 divisors (see below), whose sum is σ = 309243648. Its totient is φ = 36998208.

The previous prime is 121316971. The next prime is 121316989. The reversal of 121316988 is 889613121.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121316989) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 330381 + ... + 330747.

Almost surely, 2^121316988 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 121316988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154621824).

121316988 is an abundant number, since it is smaller than the sum of its proper divisors (187926660).

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

121316988 is a wasteful number, since it uses less digits than its factorization.

121316988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563 (or 548 counting only the distinct ones).

The product of its digits is 20736, while the sum is 39.

The square root of 121316988 is about 11014.3991211505. The cubic root of 121316988 is about 495.0402824069.

The spelling of 121316988 in words is "one hundred twenty-one million, three hundred sixteen thousand, nine hundred eighty-eight".