20111102206 has 16 divisors (see below), whose sum is σ = 32898398400. Its totient is φ = 9164551968.

The previous prime is 20111102183. The next prime is 20111102251. The reversal of 20111102206 is 60220111102.

It is a self number, because there is not a number n which added to its sum of digits gives 20111102206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4893541 + ... + 4897648.

It is an arithmetic number, because the mean of its divisors is an integer number (2056149900).

Almost surely, 2^20111102206 is an apocalyptic number.

20111102206 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20111102206 is a deficient number, since it is larger than the sum of its proper divisors (12787296194).

20111102206 is a wasteful number, since it uses less digits than its factorization.

20111102206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9791283.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20111102206 its reverse (60220111102), we get a palindrome (80331213308).

The spelling of 20111102206 in words is "twenty billion, one hundred eleven million, one hundred two thousand, two hundred six".