1213032331111 has 4 divisors (see below), whose sum is σ = 1213210961424. Its totient is φ = 1212853700800.

The previous prime is 1213032331099. The next prime is 1213032331141. The reversal of 1213032331111 is 1111332303121.

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

It is a cyclic number.

It is not a de Polignac number, because 1213032331111 - 2⁵ = 1213032331079 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 (1213032331141) 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, 89304970 + ... + 89318551.

It is an arithmetic number, because the mean of its divisors is an integer number (303302740356).

Almost surely, 2^{1213032331111} is an apocalyptic number.

1213032331111 is a deficient number, since it is larger than the sum of its proper divisors (178630313).

1213032331111 is an equidigital number, since it uses as much as digits as its factorization.

1213032331111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178630312.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1213032331111 its reverse (1111332303121), we get a palindrome (2324364634232).

The spelling of 1213032331111 in words is "one trillion, two hundred thirteen billion, thirty-two million, three hundred thirty-one thousand, one hundred eleven".