21232122122 has 4 divisors (see below), whose sum is σ = 31848183186. Its totient is φ = 10616061060.

The previous prime is 21232122097. The next prime is 21232122133. The reversal of 21232122122 is 22122123212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16136874961 + 5095247161 = 127031^2 + 71381^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21232122094 and 21232122103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5308030529 + ... + 5308030532.

Almost surely, 2^21232122122 is an apocalyptic number.

21232122122 is a deficient number, since it is larger than the sum of its proper divisors (10616061064).

21232122122 is a wasteful number, since it uses less digits than its factorization.

21232122122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10616061063.

The product of its digits is 384, while the sum is 20.

Adding to 21232122122 its reverse (22122123212), we get a palindrome (43354245334).

The spelling of 21232122122 in words is "twenty-one billion, two hundred thirty-two million, one hundred twenty-two thousand, one hundred twenty-two".