21222002011 has 4 divisors (see below), whose sum is σ = 24253716592. Its totient is φ = 18190287432.

The previous prime is 21222001981. The next prime is 21222002047. The reversal of 21222002011 is 11020022212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21222002011 - 2¹⁷ = 21221870939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21222001982 and 21222002000.

It is not an unprimeable number, because it can be changed into a prime (21222002111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515857280 + ... + 1515857293.

It is an arithmetic number, because the mean of its divisors is an integer number (6063429148).

Almost surely, 2^21222002011 is an apocalyptic number.

21222002011 is a deficient number, since it is larger than the sum of its proper divisors (3031714581).

21222002011 is an equidigital number, since it uses as much as digits as its factorization.

21222002011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3031714580.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21222002011 its reverse (11020022212), we get a palindrome (32242024223).

The spelling of 21222002011 in words is "twenty-one billion, two hundred twenty-two million, two thousand, eleven".