1213021210 has 16 divisors (see below), whose sum is σ = 2184084000. Its totient is φ = 485064976.

The previous prime is 1213021207. The next prime is 1213021223. The reversal of 1213021210 is 121203121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21741 + ... + 53839.

It is an arithmetic number, because the mean of its divisors is an integer number (136505250).

Almost surely, 2^1213021210 is an apocalyptic number.

1213021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213021210 is a deficient number, since it is larger than the sum of its proper divisors (971062790).

1213021210 is a wasteful number, since it uses less digits than its factorization.

1213021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35885.

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

The square root of 1213021210 is about 34828.4540282798. The cubic root of 1213021210 is about 1066.4883889334.

Adding to 1213021210 its reverse (121203121), we get a palindrome (1334224331).

The spelling of 1213021210 in words is "one billion, two hundred thirteen million, twenty-one thousand, two hundred ten".