21022212422242 has 32 divisors (see below), whose sum is σ = 31692807843840. Its totient is φ = 10458104384640.

The previous prime is 21022212422221. The next prime is 21022212422287. The reversal of 21022212422242 is 24222421222012.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21022212422242.

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, 636576543 + ... + 636609565.

It is an arithmetic number, because the mean of its divisors is an integer number (990400245120).

Almost surely, 2^{21022212422242} is an apocalyptic number.

21022212422242 is a deficient number, since it is larger than the sum of its proper divisors (10670595421598).

21022212422242 is a wasteful number, since it uses less digits than its factorization.

21022212422242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35418.

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 21022212422242 its reverse (24222421222012), we get a palindrome (45244633644254).

The spelling of 21022212422242 in words is "twenty-one trillion, twenty-two billion, two hundred twelve million, four hundred twenty-two thousand, two hundred forty-two".