21221021122 has 8 divisors (see below), whose sum is σ = 36378893376. Its totient is φ = 9094723332.

The previous prime is 21221021119. The next prime is 21221021149. The reversal of 21221021122 is 22112012212.

It is a happy number.

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 = 21221021096 and 21221021105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 757893598 + ... + 757893625.

It is an arithmetic number, because the mean of its divisors is an integer number (4547361672).

Almost surely, 2^21221021122 is an apocalyptic number.

21221021122 is a deficient number, since it is larger than the sum of its proper divisors (15157872254).

21221021122 is a wasteful number, since it uses less digits than its factorization.

21221021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515787232.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21221021122 its reverse (22112012212), we get a palindrome (43333033334).

It can be divided in two parts, 212210 and 21122, that added together give a palindrome (233332).

The spelling of 21221021122 in words is "twenty-one billion, two hundred twenty-one million, twenty-one thousand, one hundred twenty-two".