21622072550242 has 64 divisors (see below), whose sum is σ = 33275765571840. Its totient is φ = 10534628966400.

The previous prime is 21622072550213. The next prime is 21622072550359. The reversal of 21622072550242 is 24205527022612.

It is a happy number.

It is a super-2 number, since 2×21622072550242² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21622072550195 and 21622072550204.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3412032898 + ... + 3412039234.

It is an arithmetic number, because the mean of its divisors is an integer number (519933837060).

Almost surely, 2^{21622072550242} is an apocalyptic number.

21622072550242 is a deficient number, since it is larger than the sum of its proper divisors (11653693021598).

21622072550242 is a wasteful number, since it uses less digits than its factorization.

21622072550242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7387.

The product of its (nonzero) digits is 268800, while the sum is 40.

Adding to 21622072550242 its reverse (24205527022612), we get a palindrome (45827599572854).

The spelling of 21622072550242 in words is "twenty-one trillion, six hundred twenty-two billion, seventy-two million, five hundred fifty thousand, two hundred forty-two".