20111021192 has 64 divisors (see below), whose sum is σ = 39466224000. Its totient is φ = 9599040000.

The previous prime is 20111021191. The next prime is 20111021197. The reversal of 20111021192 is 29112011102.

It is not an unprimeable number, because it can be changed into a prime (20111021191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3979067 + ... + 3984117.

It is an arithmetic number, because the mean of its divisors is an integer number (616659750).

Almost surely, 2^20111021192 is an apocalyptic number.

It is an amenable number.

20111021192 is a deficient number, since it is larger than the sum of its proper divisors (19355202808).

20111021192 is a wasteful number, since it uses less digits than its factorization.

20111021192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5358 (or 5354 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 20111021192 its reverse (29112011102), we get a palindrome (49223032294).

The spelling of 20111021192 in words is "twenty billion, one hundred eleven million, twenty-one thousand, one hundred ninety-two".