20102122111 has 8 divisors (see below), whose sum is σ = 20207424800. Its totient is φ = 19996862688.

The previous prime is 20102122099. The next prime is 20102122121. The reversal of 20102122111 is 11122120102.

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 20102122111 - 2¹¹ = 20102120063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102122091 and 20102122100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102122121) 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, 1385185 + ... + 1399621.

It is an arithmetic number, because the mean of its divisors is an integer number (2525928100).

Almost surely, 2^20102122111 is an apocalyptic number.

20102122111 is a deficient number, since it is larger than the sum of its proper divisors (105302689).

20102122111 is a wasteful number, since it uses less digits than its factorization.

20102122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21633.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20102122111 its reverse (11122120102), we get a palindrome (31224242213).

The spelling of 20102122111 in words is "twenty billion, one hundred two million, one hundred twenty-two thousand, one hundred eleven".