21020000222 has 8 divisors (see below), whose sum is σ = 33955385016. Its totient is φ = 9701538552.

The previous prime is 21020000207. The next prime is 21020000237. The reversal of 21020000222 is 22200002012.

It is an interprime number because it is at equal distance from previous prime (21020000207) and next prime (21020000237).

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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404230748 + ... + 404230799.

It is an arithmetic number, because the mean of its divisors is an integer number (4244423127).

Almost surely, 2^21020000222 is an apocalyptic number.

21020000222 is a deficient number, since it is larger than the sum of its proper divisors (12935384794).

21020000222 is a wasteful number, since it uses less digits than its factorization.

21020000222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808461562.

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 21020000222 its reverse (22200002012), we get a palindrome (43220002234).

The spelling of 21020000222 in words is "twenty-one billion, twenty million, two hundred twenty-two", and thus it is an aban number.