21010023322 has 4 divisors (see below), whose sum is σ = 31515034986. Its totient is φ = 10505011660.

The previous prime is 21010023311. The next prime is 21010023329. The reversal of 21010023322 is 22332001012.

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., 20486483161 + 523540161 = 143131^2 + 22881^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21010023296 and 21010023305.

It is not an unprimeable number, because it can be changed into a prime (21010023329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252505829 + ... + 5252505832.

Almost surely, 2^21010023322 is an apocalyptic number.

21010023322 is a deficient number, since it is larger than the sum of its proper divisors (10505011664).

21010023322 is a wasteful number, since it uses less digits than its factorization.

21010023322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10505011663.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21010023322 its reverse (22332001012), we get a palindrome (43342024334).

The spelling of 21010023322 in words is "twenty-one billion, ten million, twenty-three thousand, three hundred twenty-two".