20121011196 has 96 divisors (see below), whose sum is σ = 55201741056. Its totient is φ = 5623680000.

The previous prime is 20121011177. The next prime is 20121011201. The reversal of 20121011196 is 69111012102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2485876 + ... + 2493956.

It is an arithmetic number, because the mean of its divisors is an integer number (575018136).

Almost surely, 2^20121011196 is an apocalyptic number.

20121011196 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20121011196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27600870528).

20121011196 is an abundant number, since it is smaller than the sum of its proper divisors (35080729860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121011196 is a wasteful number, since it uses less digits than its factorization.

20121011196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9563 (or 9561 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 24.

Adding to 20121011196 its reverse (69111012102), we get a palindrome (89232023298).

The spelling of 20121011196 in words is "twenty billion, one hundred twenty-one million, eleven thousand, one hundred ninety-six".