20113210111 has 4 divisors (see below), whose sum is σ = 20120975424. Its totient is φ = 20105444800.

The previous prime is 20113210097. The next prime is 20113210123. The reversal of 20113210111 is 11101231102.

It is a happy number.

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 20113210111 - 2¹³ = 20113201919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20113210091 and 20113210100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113210151) 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, 3878770 + ... + 3883951.

It is an arithmetic number, because the mean of its divisors is an integer number (5030243856).

Almost surely, 2^20113210111 is an apocalyptic number.

20113210111 is a deficient number, since it is larger than the sum of its proper divisors (7765313).

20113210111 is an equidigital number, since it uses as much as digits as its factorization.

20113210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7765312.

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

Adding to 20113210111 its reverse (11101231102), we get a palindrome (31214441213).

The spelling of 20113210111 in words is "twenty billion, one hundred thirteen million, two hundred ten thousand, one hundred eleven".