21021223223022 has 64 divisors (see below), whose sum is σ = 46053894988800. Its totient is φ = 6343780446080.

The previous prime is 21021223223009. The next prime is 21021223223023. The reversal of 21021223223022 is 22032232212012.

It is a junction number, because it is equal to n+sod(n) for n = 21021223222983 and 21021223223001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021223223023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43202104 + ... + 43685972.

It is an arithmetic number, because the mean of its divisors is an integer number (719592109200).

Almost surely, 2^{21021223223022} is an apocalyptic number.

21021223223022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21021223223022 is an abundant number, since it is smaller than the sum of its proper divisors (25032671765778).

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

21021223223022 is a wasteful number, since it uses less digits than its factorization.

21021223223022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486601.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21021223223022 its reverse (22032232212012), we get a palindrome (43053455435034).

The spelling of 21021223223022 in words is "twenty-one trillion, twenty-one billion, two hundred twenty-three million, two hundred twenty-three thousand, twenty-two".