12121310 has 32 divisors (see below), whose sum is σ = 22927104. Its totient is φ = 4608000.

The previous prime is 12121309. The next prime is 12121321. The reversal of 12121310 is 1312121.

It is a super-2 number, since 2×12121310² = 293852312232200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12121291 and 12121300.

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, 18590 + ... + 19230.

It is an arithmetic number, because the mean of its divisors is an integer number (716472).

Almost surely, 2^12121310 is an apocalyptic number.

12121310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121310 is a deficient number, since it is larger than the sum of its proper divisors (10805794).

12121310 is a wasteful number, since it uses less digits than its factorization.

12121310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 12121310 is about 3481.5671758563. The cubic root of 12121310 is about 229.7117371650.

Adding to 12121310 its reverse (1312121), we get a palindrome (13433431).

The spelling of 12121310 in words is "twelve million, one hundred twenty-one thousand, three hundred ten".