121667988 has 96 divisors (see below), whose sum is σ = 318536064. Its totient is φ = 35900928.

The previous prime is 121667981. The next prime is 121667989. The reversal of 121667988 is 889766121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121667981) 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, 617506 + ... + 617702.

It is an arithmetic number, because the mean of its divisors is an integer number (3318084).

Almost surely, 2^121667988 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 121667988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159268032).

121667988 is an abundant number, since it is smaller than the sum of its proper divisors (196868076).

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

121667988 is a wasteful number, since it uses less digits than its factorization.

121667988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 359 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The square root of 121667988 is about 11030.3213008507. The cubic root of 121667988 is about 495.5172472981.

The spelling of 121667988 in words is "one hundred twenty-one million, six hundred sixty-seven thousand, nine hundred eighty-eight".