10001213111 has 4 divisors (see below), whose sum is σ = 10003774224. Its totient is φ = 9998652000.

The previous prime is 10001213059. The next prime is 10001213153. The reversal of 10001213111 is 11131210001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11131210001 = 31159 ⋅357239.

It is a cyclic number.

It is not a de Polignac number, because 10001213111 - 2¹⁰ = 10001212087 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001213092 and 10001213101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001213161) 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, 1274690 + ... + 1282511.

It is an arithmetic number, because the mean of its divisors is an integer number (2500943556).

Almost surely, 2^10001213111 is an apocalyptic number.

10001213111 is a deficient number, since it is larger than the sum of its proper divisors (2561113).

10001213111 is an equidigital number, since it uses as much as digits as its factorization.

10001213111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561112.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 10001213111 its reverse (11131210001), we get a palindrome (21132423112).

The spelling of 10001213111 in words is "ten billion, one million, two hundred thirteen thousand, one hundred eleven".