121312310 has 16 divisors (see below), whose sum is σ = 249556896. Its totient is φ = 41592768.

The previous prime is 121312297. The next prime is 121312339. The reversal of 121312310 is 13213121.

It is a super-2 number, since 2×121312310² = 29433353115072200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

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, 866447 + ... + 866586.

It is an arithmetic number, because the mean of its divisors is an integer number (15597306).

Almost surely, 2^121312310 is an apocalyptic number.

121312310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121312310 is an abundant number, since it is smaller than the sum of its proper divisors (128244586).

121312310 is a wasteful number, since it uses less digits than its factorization.

121312310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733047.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 121312310 is about 11014.1867607191. The cubic root of 121312310 is about 495.0339193843.

Adding to 121312310 its reverse (13213121), we get a palindrome (134525431).

It can be divided in two parts, 12131 and 2310, that added together give a palindrome (14441).

The spelling of 121312310 in words is "one hundred twenty-one million, three hundred twelve thousand, three hundred ten".