1213020206 has 4 divisors (see below), whose sum is σ = 1819530312. Its totient is φ = 606510102.

The previous prime is 1213020191. The next prime is 1213020217. The reversal of 1213020206 is 6020203121.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 303255050 + ... + 303255053.

It is an arithmetic number, because the mean of its divisors is an integer number (454882578).

Almost surely, 2^1213020206 is an apocalyptic number.

1213020206 is a deficient number, since it is larger than the sum of its proper divisors (606510106).

1213020206 is an equidigital number, since it uses as much as digits as its factorization.

1213020206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606510105.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1213020206 is about 34828.4396147746. The cubic root of 1213020206 is about 1066.4880946944.

Adding to 1213020206 its reverse (6020203121), we get a palindrome (7233223327).

The spelling of 1213020206 in words is "one billion, two hundred thirteen million, twenty thousand, two hundred six".