21022405205222 has 16 divisors (see below), whose sum is σ = 32703142329360. Its totient is φ = 10123183734048.

The previous prime is 21022405205213. The next prime is 21022405205231. The reversal of 21022405205222 is 22250250422012.

It is an interprime number because it is at equal distance from previous prime (21022405205213) and next prime (21022405205231).

It is a super-2 number, since 2×21022405205222² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

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, 456469748 + ... + 456515799.

It is an arithmetic number, because the mean of its divisors is an integer number (2043946395585).

Almost surely, 2^{21022405205222} is an apocalyptic number.

21022405205222 is a deficient number, since it is larger than the sum of its proper divisors (11680737124138).

21022405205222 is a wasteful number, since it uses less digits than its factorization.

21022405205222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912985975.

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 21022405205222 its reverse (22250250422012), we get a palindrome (43272655627234).

The spelling of 21022405205222 in words is "twenty-one trillion, twenty-two billion, four hundred five million, two hundred five thousand, two hundred twenty-two".