1213321323111 has 16 divisors (see below), whose sum is σ = 1626092027616. Its totient is φ = 804726337536.

The previous prime is 1213321323103. The next prime is 1213321323127. The reversal of 1213321323111 is 1113231233121.

It is not a de Polignac number, because 1213321323111 - 2³ = 1213321323103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213321323311) 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, 864460 + ... + 1781553.

It is an arithmetic number, because the mean of its divisors is an integer number (101630751726).

Almost surely, 2^{1213321323111} is an apocalyptic number.

1213321323111 is a deficient number, since it is larger than the sum of its proper divisors (412770704505).

1213321323111 is a wasteful number, since it uses less digits than its factorization.

1213321323111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2646802.

The product of its digits is 648, while the sum is 24.

Adding to 1213321323111 its reverse (1113231233121), we get a palindrome (2326552556232).

The spelling of 1213321323111 in words is "one trillion, two hundred thirteen billion, three hundred twenty-one million, three hundred twenty-three thousand, one hundred eleven".