20202020111 has 16 divisors (see below), whose sum is σ = 24988992000. Its totient is φ = 15903679968.

The previous prime is 20202020099. The next prime is 20202020119. The reversal of 20202020111 is 11102020202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20202020111 - 2¹⁰ = 20202019087 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20202020092 and 20202020101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202020119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 539681 + ... + 575898.

It is an arithmetic number, because the mean of its divisors is an integer number (1561812000).

Almost surely, 2^20202020111 is an apocalyptic number.

20202020111 is a deficient number, since it is larger than the sum of its proper divisors (4786971889).

20202020111 is a wasteful number, since it uses less digits than its factorization.

20202020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115798.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20202020111 its reverse (11102020202), we get a palindrome (31304040313).

Subtracting from 20202020111 its reverse (11102020202), we obtain a palindrome (9099999909).

The spelling of 20202020111 in words is "twenty billion, two hundred two million, twenty thousand, one hundred eleven".