121198660 has 24 divisors (see below), whose sum is σ = 277655616. Its totient is φ = 44072160.

The previous prime is 121198657. The next prime is 121198691. The reversal of 121198660 is 66891121.

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, 275232 + ... + 275671.

It is an arithmetic number, because the mean of its divisors is an integer number (11568984).

Almost surely, 2^121198660 is an apocalyptic number.

121198660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121198660 is an abundant number, since it is smaller than the sum of its proper divisors (156456956).

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

121198660 is a wasteful number, since it uses less digits than its factorization.

121198660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550923 (or 550921 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 121198660 is about 11009.0262966350. The cubic root of 121198660 is about 494.8792821973.

The spelling of 121198660 in words is "one hundred twenty-one million, one hundred ninety-eight thousand, six hundred sixty".