20020231331111 has 8 divisors (see below), whose sum is σ = 21852854951184. Its totient is φ = 18189708142720.

The previous prime is 20020231331081. The next prime is 20020231331143. The reversal of 20020231331111 is 11113313202002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020231331111 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 (20020231330111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525087986 + ... + 525126111.

It is an arithmetic number, because the mean of its divisors is an integer number (2731606868898).

Almost surely, 2^{20020231331111} is an apocalyptic number.

20020231331111 is a deficient number, since it is larger than the sum of its proper divisors (1832623620073).

20020231331111 is a wasteful number, since it uses less digits than its factorization.

20020231331111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050215841.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 20020231331111 its reverse (11113313202002), we get a palindrome (31133544533113).

The spelling of 20020231331111 in words is "twenty trillion, twenty billion, two hundred thirty-one million, three hundred thirty-one thousand, one hundred eleven".