20112313342021 has 4 divisors (see below), whose sum is σ = 21295390597452. Its totient is φ = 18929236086592.

The previous prime is 20112313341977. The next prime is 20112313342087. The reversal of 20112313342021 is 12024331321102.

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 10823771002500 + 9288542339521 = 3289950^2 + 3047711^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112313342021 - 2²⁷ = 20112179124293 is a prime.

It is a super-2 number, since 2×20112313342021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112313342921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591538627690 + ... + 591538627723.

It is an arithmetic number, because the mean of its divisors is an integer number (5323847649363).

Almost surely, 2^{20112313342021} is an apocalyptic number.

It is an amenable number.

20112313342021 is a deficient number, since it is larger than the sum of its proper divisors (1183077255431).

20112313342021 is a wasteful number, since it uses less digits than its factorization.

20112313342021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183077255430.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 20112313342021 its reverse (12024331321102), we get a palindrome (32136644663123).

The spelling of 20112313342021 in words is "twenty trillion, one hundred twelve billion, three hundred thirteen million, three hundred forty-two thousand, twenty-one".