20201131111 has 8 divisors (see below), whose sum is σ = 23176841760. Its totient is φ = 17247879168.

The previous prime is 20201131103. The next prime is 20201131123. The reversal of 20201131111 is 11113110202.

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 not a de Polignac number, because 20201131111 - 2³ = 20201131103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201131091 and 20201131100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201132111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5612746 + ... + 5616343.

It is an arithmetic number, because the mean of its divisors is an integer number (2897105220).

Almost surely, 2^20201131111 is an apocalyptic number.

20201131111 is a deficient number, since it is larger than the sum of its proper divisors (2975710649).

20201131111 is a wasteful number, since it uses less digits than its factorization.

20201131111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11229353.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 20201131111 its reverse (11113110202), we get a palindrome (31314241313).

The spelling of 20201131111 in words is "twenty billion, two hundred one million, one hundred thirty-one thousand, one hundred eleven".