21020101222 has 8 divisors (see below), whose sum is σ = 31530856896. Its totient is φ = 10509815592.

The previous prime is 21020101213. The next prime is 21020101247. The reversal of 21020101222 is 22210102012.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32683 + ... + 207625.

It is an arithmetic number, because the mean of its divisors is an integer number (3941357112).

Almost surely, 2^21020101222 is an apocalyptic number.

21020101222 is a deficient number, since it is larger than the sum of its proper divisors (10510755674).

21020101222 is a wasteful number, since it uses less digits than its factorization.

21020101222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235022.

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

Adding to 21020101222 its reverse (22210102012), we get a palindrome (43230203234).

The spelling of 21020101222 in words is "twenty-one billion, twenty million, one hundred one thousand, two hundred twenty-two".