20110122205 has 8 divisors (see below), whose sum is σ = 25551684792. Its totient is φ = 15141739008.

The previous prime is 20110122199. The next prime is 20110122233. The reversal of 20110122205 is 50222101102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8615923684 + 11494198521 = 92822^2 + 107211^2 .

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-20110122205 is a prime.

It is a Duffinian number.

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, 118294752 + ... + 118294921.

It is an arithmetic number, because the mean of its divisors is an integer number (3193960599).

Almost surely, 2^20110122205 is an apocalyptic number.

It is an amenable number.

20110122205 is a deficient number, since it is larger than the sum of its proper divisors (5441562587).

20110122205 is a wasteful number, since it uses less digits than its factorization.

20110122205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236589695.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 20110122205 its reverse (50222101102), we get a palindrome (70332223307).

The spelling of 20110122205 in words is "twenty billion, one hundred ten million, one hundred twenty-two thousand, two hundred five".