21011040222 has 16 divisors (see below), whose sum is σ = 42026003712. Its totient is φ = 7003026200.

The previous prime is 21011040151. The next prime is 21011040269. The reversal of 21011040222 is 22204011012.

It is a super-2 number, since 2×21011040222² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 91404 + ... + 224447.

It is an arithmetic number, because the mean of its divisors is an integer number (2626625232).

Almost surely, 2^21011040222 is an apocalyptic number.

21011040222 is an abundant number, since it is smaller than the sum of its proper divisors (21014963490).

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

21011040222 is a wasteful number, since it uses less digits than its factorization.

21011040222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326943.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21011040222 its reverse (22204011012), we get a palindrome (43215051234).

The spelling of 21011040222 in words is "twenty-one billion, eleven million, forty thousand, two hundred twenty-two".