21022001022 has 16 divisors (see below), whose sum is σ = 45866184192. Its totient is φ = 6370303320.

The previous prime is 21022000903. The next prime is 21022001029. The reversal of 21022001022 is 22010022012.

It is a junction number, because it is equal to n+sod(n) for n = 21022000989 and 21022001007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022001029) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 159257518 + ... + 159257649.

It is an arithmetic number, because the mean of its divisors is an integer number (2866636512).

Almost surely, 2^21022001022 is an apocalyptic number.

21022001022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21022001022 is an abundant number, since it is smaller than the sum of its proper divisors (24844183170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21022001022 is a wasteful number, since it uses less digits than its factorization.

21022001022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318515183.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21022001022 its reverse (22010022012), we get a palindrome (43032023034).

The spelling of 21022001022 in words is "twenty-one billion, twenty-two million, one thousand, twenty-two".