21001010222 has 8 divisors (see below), whose sum is σ = 31503237336. Its totient is φ = 10499931112.

The previous prime is 21001010179. The next prime is 21001010237. The reversal of 21001010222 is 22201010012.

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 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, 239708 + ... + 315375.

It is an arithmetic number, because the mean of its divisors is an integer number (3937904667).

Almost surely, 2^21001010222 is an apocalyptic number.

21001010222 is a deficient number, since it is larger than the sum of its proper divisors (10502227114).

21001010222 is a wasteful number, since it uses less digits than its factorization.

21001010222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574002.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21001010222 its reverse (22201010012), we get a palindrome (43202020234).

The spelling of 21001010222 in words is "twenty-one billion, one million, ten thousand, two hundred twenty-two".