121310210 has 16 divisors (see below), whose sum is σ = 249552576. Its totient is φ = 41592048.

The previous prime is 121310197. The next prime is 121310251. The reversal of 121310210 is 12013121.

It is a junction number, because it is equal to n+sod(n) for n = 121310191 and 121310200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 866432 + ... + 866571.

It is an arithmetic number, because the mean of its divisors is an integer number (15597036).

Almost surely, 2^121310210 is an apocalyptic number.

121310210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121310210 is an abundant number, since it is smaller than the sum of its proper divisors (128242366).

121310210 is a wasteful number, since it uses less digits than its factorization.

121310210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733017.

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

The square root of 121310210 is about 11014.0914287108. The cubic root of 121310210 is about 495.0310629080.

Adding to 121310210 its reverse (12013121), we get a palindrome (133323331).

The spelling of 121310210 in words is "one hundred twenty-one million, three hundred ten thousand, two hundred ten".