1211210013 has 16 divisors (see below), whose sum is σ = 1751875776. Its totient is φ = 739916160.

The previous prime is 1211210009. The next prime is 1211210041. The reversal of 1211210013 is 3100121121.

It is not a de Polignac number, because 1211210013 - 2² = 1211210009 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211210053) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 108003 + ... + 118688.

It is an arithmetic number, because the mean of its divisors is an integer number (109492236).

Almost surely, 2^1211210013 is an apocalyptic number.

1211210013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1211210013 is a deficient number, since it is larger than the sum of its proper divisors (540665763).

1211210013 is a wasteful number, since it uses less digits than its factorization.

1211210013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226844.

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

The square root of 1211210013 is about 34802.4426297925. The cubic root of 1211210013 is about 1065.9573229913.

Adding to 1211210013 its reverse (3100121121), we get a palindrome (4311331134).

The spelling of 1211210013 in words is "one billion, two hundred eleven million, two hundred ten thousand, thirteen".