21001222210022 has 16 divisors (see below), whose sum is σ = 33172276757760. Its totient is φ = 9944211697992.

The previous prime is 21001222210019. The next prime is 21001222210037. The reversal of 21001222210022 is 22001222210012.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 103665938 + ... + 103868325.

It is an arithmetic number, because the mean of its divisors is an integer number (2073267297360).

Almost surely, 2^{21001222210022} is an apocalyptic number.

21001222210022 is a deficient number, since it is larger than the sum of its proper divisors (12171054547738).

21001222210022 is a wasteful number, since it uses less digits than its factorization.

21001222210022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207536947.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21001222210022 its reverse (22001222210012), we get a palindrome (43002444420034).

The spelling of 21001222210022 in words is "twenty-one trillion, one billion, two hundred twenty-two million, two hundred ten thousand, twenty-two".