20091020110101 has 12 divisors (see below), whose sum is σ = 29045144943360. Its totient is φ = 13382575301160.

The previous prime is 20091020110061. The next prime is 20091020110157. The reversal of 20091020110101 is 10101102019002.

It is a happy number.

It is not a de Polignac number, because 20091020110101 - 2¹⁸ = 20091019847957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20091021110101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 953164341 + ... + 953185418.

It is an arithmetic number, because the mean of its divisors is an integer number (2420428745280).

Almost surely, 2^{20091020110101} is an apocalyptic number.

It is an amenable number.

20091020110101 is a deficient number, since it is larger than the sum of its proper divisors (8954124833259).

20091020110101 is a wasteful number, since it uses less digits than its factorization.

20091020110101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1906350936 (or 1906350933 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

Adding to 20091020110101 its reverse (10101102019002), we get a palindrome (30192122129103).

The spelling of 20091020110101 in words is "twenty trillion, ninety-one billion, twenty million, one hundred ten thousand, one hundred one".