121668510 has 32 divisors (see below), whose sum is σ = 292857120. Its totient is φ = 32350208.

The previous prime is 121668509. The next prime is 121668553. The reversal of 121668510 is 15866121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4846 + ... + 16334.

It is an arithmetic number, because the mean of its divisors is an integer number (9151785).

Almost surely, 2^121668510 is an apocalyptic number.

121668510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121668510 is an abundant number, since it is smaller than the sum of its proper divisors (171188610).

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

121668510 is a wasteful number, since it uses less digits than its factorization.

121668510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11852.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 121668510 is about 11030.3449628740. The cubic root of 121668510 is about 495.5179559469.

The spelling of 121668510 in words is "one hundred twenty-one million, six hundred sixty-eight thousand, five hundred ten".