1213022220111 has 16 divisors (see below), whose sum is σ = 1935306106720. Its totient is φ = 746475212160.

The previous prime is 1213022220077. The next prime is 1213022220191. The reversal of 1213022220111 is 1110222203121.

It is not a de Polignac number, because 1213022220111 - 2¹⁵ = 1213022187343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213022220191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1727951530 + ... + 1727952231.

It is an arithmetic number, because the mean of its divisors is an integer number (120956631670).

Almost surely, 2^{1213022220111} is an apocalyptic number.

1213022220111 is a deficient number, since it is larger than the sum of its proper divisors (722283886609).

1213022220111 is a wasteful number, since it uses less digits than its factorization.

1213022220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3455903783 (or 3455903777 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1213022220111 its reverse (1110222203121), we get a palindrome (2323244423232).

The spelling of 1213022220111 in words is "one trillion, two hundred thirteen billion, twenty-two million, two hundred twenty thousand, one hundred eleven".