1231112210213 has 4 divisors (see below), whose sum is σ = 1231134709728. Its totient is φ = 1231089710700.

The previous prime is 1231112210137. The next prime is 1231112210233. The reversal of 1231112210213 is 3120122111321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1231112210213 - 2¹⁶ = 1231112144677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231112210233) 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, 11167481 + ... + 11277182.

It is an arithmetic number, because the mean of its divisors is an integer number (307783677432).

Almost surely, 2^{1231112210213} is an apocalyptic number.

It is an amenable number.

1231112210213 is a deficient number, since it is larger than the sum of its proper divisors (22499515).

1231112210213 is an equidigital number, since it uses as much as digits as its factorization.

1231112210213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22499514.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1231112210213 its reverse (3120122111321), we get a palindrome (4351234321534).

The spelling of 1231112210213 in words is "one trillion, two hundred thirty-one billion, one hundred twelve million, two hundred ten thousand, two hundred thirteen".