20011221096 has 32 divisors (see below), whose sum is σ = 50164391040. Its totient is φ = 6652228608.

The previous prime is 20011221089. The next prime is 20011221107. The reversal of 20011221096 is 69012211002.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1127161 + ... + 1144776.

It is an arithmetic number, because the mean of its divisors is an integer number (1567637220).

Almost surely, 2^20011221096 is an apocalyptic number.

It is an amenable number.

20011221096 is an abundant number, since it is smaller than the sum of its proper divisors (30153169944).

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

20011221096 is a wasteful number, since it uses less digits than its factorization.

20011221096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272313 (or 2272309 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 20011221096 its reverse (69012211002), we get a palindrome (89023432098).

The spelling of 20011221096 in words is "twenty billion, eleven million, two hundred twenty-one thousand, ninety-six".