121231210 has 16 divisors (see below), whose sum is σ = 229701600. Its totient is φ = 45940176.

The previous prime is 121231181. The next prime is 121231237. The reversal of 121231210 is 12132121.

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 7 ways as a sum of consecutive naturals, for example, 318840 + ... + 319219.

It is an arithmetic number, because the mean of its divisors is an integer number (14356350).

Almost surely, 2^121231210 is an apocalyptic number.

121231210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121231210 is a deficient number, since it is larger than the sum of its proper divisors (108470390).

121231210 is a wasteful number, since it uses less digits than its factorization.

121231210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638085.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 121231210 is about 11010.5045297661. The cubic root of 121231210 is about 494.9235810336.

Adding to 121231210 its reverse (12132121), we get a palindrome (133363331).

The spelling of 121231210 in words is "one hundred twenty-one million, two hundred thirty-one thousand, two hundred ten".