21202442122 has 8 divisors (see below), whose sum is σ = 31804819200. Its totient is φ = 10600835724.

The previous prime is 21202442119. The next prime is 21202442123. The reversal of 21202442122 is 22124420212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21202442093 and 21202442102.

It is not an unprimeable number, because it can be changed into a prime (21202442123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118122 + ... + 237397.

It is an arithmetic number, because the mean of its divisors is an integer number (3975602400).

Almost surely, 2^21202442122 is an apocalyptic number.

21202442122 is a deficient number, since it is larger than the sum of its proper divisors (10602377078).

21202442122 is a wasteful number, since it uses less digits than its factorization.

21202442122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385340.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 21202442122 its reverse (22124420212), we get a palindrome (43326862334).

The spelling of 21202442122 in words is "twenty-one billion, two hundred two million, four hundred forty-two thousand, one hundred twenty-two".