21001022002022 has 16 divisors (see below), whose sum is σ = 32486660928000. Its totient is φ = 10177148399880.

The previous prime is 21001022001913. The next prime is 21001022002039. The reversal of 21001022002022 is 22020022010012.

It is a junction number, because it is equal to n+sod(n) for n = 21001022001988 and 21001022002006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1253335022 + ... + 1253351777.

It is an arithmetic number, because the mean of its divisors is an integer number (2030416308000).

Almost surely, 2^{21001022002022} is an apocalyptic number.

21001022002022 is a deficient number, since it is larger than the sum of its proper divisors (11485638925978).

21001022002022 is a wasteful number, since it uses less digits than its factorization.

21001022002022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506686931.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21001022002022 its reverse (22020022010012), we get a palindrome (43021044012034).

The spelling of 21001022002022 in words is "twenty-one trillion, one billion, twenty-two million, two thousand, twenty-two".