121601310 has 32 divisors (see below), whose sum is σ = 292464000. Its totient is φ = 32358048.

The previous prime is 121601309. The next prime is 121601317. The reversal of 121601310 is 13106121.

It is a super-2 number, since 2×121601310² = 29573757187432200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121601310.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121601317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10909 + ... + 19031.

It is an arithmetic number, because the mean of its divisors is an integer number (9139500).

Almost surely, 2^121601310 is an apocalyptic number.

121601310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121601310 is an abundant number, since it is smaller than the sum of its proper divisors (170862690).

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

121601310 is a wasteful number, since it uses less digits than its factorization.

121601310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8632.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 121601310 is about 11027.2983998802. The cubic root of 121601310 is about 495.4267109210.

Adding to 121601310 its reverse (13106121), we get a palindrome (134707431).

The spelling of 121601310 in words is "one hundred twenty-one million, six hundred one thousand, three hundred ten".