20111102207 has 16 divisors (see below), whose sum is σ = 23781634560. Its totient is φ = 16640197728.

The previous prime is 20111102183. The next prime is 20111102251. The reversal of 20111102207 is 70220111102.

It is not a de Polignac number, because 20111102207 - 2²² = 20106907903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111102257) 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, 1525478 + ... + 1538604.

It is an arithmetic number, because the mean of its divisors is an integer number (1486352160).

Almost surely, 2^20111102207 is an apocalyptic number.

20111102207 is a deficient number, since it is larger than the sum of its proper divisors (3670532353).

20111102207 is a wasteful number, since it uses less digits than its factorization.

20111102207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20710.

The product of its (nonzero) digits is 56, while the sum is 17.

Adding to 20111102207 its reverse (70220111102), we get a palindrome (90331213309).

The spelling of 20111102207 in words is "twenty billion, one hundred eleven million, one hundred two thousand, two hundred seven".