1212211000013 has 4 divisors (see below), whose sum is σ = 1305458000028. Its totient is φ = 1118964000000.

The previous prime is 1212210999977. The next prime is 1212211000051. The reversal of 1212211000013 is 3100001122121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 427634907844 + 784576092169 = 653938^2 + 885763^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212211000013 - 2⁸ = 1212210999757 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 (1212211000513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46623499988 + ... + 46623500013.

It is an arithmetic number, because the mean of its divisors is an integer number (326364500007).

Almost surely, 2^{1212211000013} is an apocalyptic number.

1212211000013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1212211000013 is a deficient number, since it is larger than the sum of its proper divisors (93247000015).

1212211000013 is an equidigital number, since it uses as much as digits as its factorization.

1212211000013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93247000014.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1212211000013 its reverse (3100001122121), we get a palindrome (4312212122134).

The spelling of 1212211000013 in words is "one trillion, two hundred twelve billion, two hundred eleven million, thirteen", and thus it is an aban number.