20202120111 has 8 divisors (see below), whose sum is σ = 26936871984. Its totient is φ = 13467724160.

The previous prime is 20202120089. The next prime is 20202120137. The reversal of 20202120111 is 11102120202.

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-20202120111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202120161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102055 + ... + 225431.

It is an arithmetic number, because the mean of its divisors is an integer number (3367108998).

Almost surely, 2^20202120111 is an apocalyptic number.

20202120111 is a deficient number, since it is larger than the sum of its proper divisors (6734751873).

20202120111 is a wasteful number, since it uses less digits than its factorization.

20202120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177961.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20202120111 its reverse (11102120202), we get a palindrome (31304240313).

Subtracting from 20202120111 its reverse (11102120202), we obtain a palindrome (9099999909).

The spelling of 20202120111 in words is "twenty billion, two hundred two million, one hundred twenty thousand, one hundred eleven".