121610808 has 192 divisors, whose sum is σ = 383685120. Its totient is φ = 36067680.

The previous prime is 121610807. The next prime is 121610851. The reversal of 121610808 is 808016121.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121610803) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2587441 + ... + 2587487.

It is an arithmetic number, because the mean of its divisors is an integer number (1998360).

Almost surely, 2^121610808 is an apocalyptic number.

121610808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121610808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191842560).

121610808 is an abundant number, since it is smaller than the sum of its proper divisors (262074312).

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

121610808 is an equidigital number, since it uses as much as digits as its factorization.

121610808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 121610808 is about 11027.7290499903. The cubic root of 121610808 is about 495.4396094673.

Adding to 121610808 its reverse (808016121), we get a palindrome (929626929).

The spelling of 121610808 in words is "one hundred twenty-one million, six hundred ten thousand, eight hundred eight".