21011020222 has 8 divisors (see below), whose sum is σ = 33370443936. Its totient is φ = 9887538912.

The previous prime is 21011020183. The next prime is 21011020243. The reversal of 21011020222 is 22202011012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308985558 + ... + 308985625.

It is an arithmetic number, because the mean of its divisors is an integer number (4171305492).

Almost surely, 2^21011020222 is an apocalyptic number.

21011020222 is a deficient number, since it is larger than the sum of its proper divisors (12359423714).

21011020222 is a wasteful number, since it uses less digits than its factorization.

21011020222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617971202.

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

Adding to 21011020222 its reverse (22202011012), we get a palindrome (43213031234).

The spelling of 21011020222 in words is "twenty-one billion, eleven million, twenty thousand, two hundred twenty-two".