21220111001192 has 16 divisors (see below), whose sum is σ = 39857388885600. Its totient is φ = 10591473965040.

The previous prime is 21220111001191. The next prime is 21220111001267. The reversal of 21220111001192 is 29110011102212.

It is a happy number.

It is a super-2 number, since 2×21220111001192² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21220111001191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2322687092 + ... + 2322696227.

It is an arithmetic number, because the mean of its divisors is an integer number (2491086805350).

Almost surely, 2^{21220111001192} is an apocalyptic number.

It is an amenable number.

21220111001192 is a deficient number, since it is larger than the sum of its proper divisors (18637277884408).

21220111001192 is a wasteful number, since it uses less digits than its factorization.

21220111001192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4645383896 (or 4645383892 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 21220111001192 in words is "twenty-one trillion, two hundred twenty billion, one hundred eleven million, one thousand, one hundred ninety-two".