2012113323221 has 4 divisors (see below), whose sum is σ = 2013408954732. Its totient is φ = 2010817691712.

The previous prime is 2012113323193. The next prime is 2012113323277. The reversal of 2012113323221 is 1223233112102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 203125983025 + 1808987340196 = 450695^2 + 1344986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2012113323221 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 (2012113323721) 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, 647813426 + ... + 647816531.

It is an arithmetic number, because the mean of its divisors is an integer number (503352238683).

Almost surely, 2^{2012113323221} is an apocalyptic number.

It is an amenable number.

2012113323221 is a deficient number, since it is larger than the sum of its proper divisors (1295631511).

2012113323221 is a wasteful number, since it uses less digits than its factorization.

2012113323221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295631510.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2012113323221 its reverse (1223233112102), we get a palindrome (3235346435323).

The spelling of 2012113323221 in words is "two trillion, twelve billion, one hundred thirteen million, three hundred twenty-three thousand, two hundred twenty-one".