20012311343111 has 4 divisors (see below), whose sum is σ = 20012506815312. Its totient is φ = 20012115870912.

The previous prime is 20012311343107. The next prime is 20012311343161. The reversal of 20012311343111 is 11134311321002.

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 20012311343111 - 2² = 20012311343107 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 (20012311343161) 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, 97582451 + ... + 97787316.

It is an arithmetic number, because the mean of its divisors is an integer number (5003126703828).

Almost surely, 2^{20012311343111} is an apocalyptic number.

20012311343111 is a deficient number, since it is larger than the sum of its proper divisors (195472201).

20012311343111 is a wasteful number, since it uses less digits than its factorization.

20012311343111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195472200.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 20012311343111 its reverse (11134311321002), we get a palindrome (31146622664113).

The spelling of 20012311343111 in words is "twenty trillion, twelve billion, three hundred eleven million, three hundred forty-three thousand, one hundred eleven".