21001222002022 has 32 divisors (see below), whose sum is σ = 32058453127680. Its totient is φ = 10315507438080.

The previous prime is 21001222001987. The next prime is 21001222002031. The reversal of 21001222002022 is 22020022210012.

It is a junction number, because it is equal to n+sod(n) for n = 21001222001987 and 21001222002005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 750914683 + ... + 750942649.

It is an arithmetic number, because the mean of its divisors is an integer number (1001826660240).

Almost surely, 2^{21001222002022} is an apocalyptic number.

21001222002022 is a deficient number, since it is larger than the sum of its proper divisors (11057231125658).

21001222002022 is a wasteful number, since it uses less digits than its factorization.

21001222002022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35536.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21001222002022 its reverse (22020022210012), we get a palindrome (43021244212034).

The spelling of 21001222002022 in words is "twenty-one trillion, one billion, two hundred twenty-two million, two thousand, twenty-two".