1213102311011 has 4 divisors (see below), whose sum is σ = 1213111818024. Its totient is φ = 1213092804000.

The previous prime is 1213102310977. The next prime is 1213102311013. The reversal of 1213102311011 is 1101132013121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213102311011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213102311013) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4559465 + ... + 4818186.

It is an arithmetic number, because the mean of its divisors is an integer number (303277954506).

Almost surely, 2^{1213102311011} is an apocalyptic number.

1213102311011 is a deficient number, since it is larger than the sum of its proper divisors (9507013).

1213102311011 is an equidigital number, since it uses as much as digits as its factorization.

1213102311011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9507012.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 1213102311011 its reverse (1101132013121), we get a palindrome (2314234324132).

The spelling of 1213102311011 in words is "one trillion, two hundred thirteen billion, one hundred two million, three hundred eleven thousand, eleven".