121623660 has 96 divisors (see below), whose sum is σ = 383308800. Its totient is φ = 32011200.

The previous prime is 121623659. The next prime is 121623713. The reversal of 121623660 is 66326121.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41235 + ... + 44085.

It is an arithmetic number, because the mean of its divisors is an integer number (3992800).

Almost surely, 2^121623660 is an apocalyptic number.

121623660 is a gapful number since it is divisible by the number (10) 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 121623660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191654400).

121623660 is an abundant number, since it is smaller than the sum of its proper divisors (261685140).

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

121623660 is a wasteful number, since it uses less digits than its factorization.

121623660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2948 (or 2940 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 121623660 is about 11028.3117474979. The cubic root of 121623660 is about 495.4570617691.

Adding to 121623660 its reverse (66326121), we get a palindrome (187949781).

The spelling of 121623660 in words is "one hundred twenty-one million, six hundred twenty-three thousand, six hundred sixty".