21121200322 has 4 divisors (see below), whose sum is σ = 31681800486. Its totient is φ = 10560600160.

The previous prime is 21121200313. The next prime is 21121200329. The reversal of 21121200322 is 22300212112.

It is a happy number.

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., 15178486401 + 5942713921 = 123201^2 + 77089^2 .

It is a super-2 number, since 2×21121200322² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121200296 and 21121200305.

It is not an unprimeable number, because it can be changed into a prime (21121200329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280300079 + ... + 5280300082.

Almost surely, 2^21121200322 is an apocalyptic number.

21121200322 is a deficient number, since it is larger than the sum of its proper divisors (10560600164).

21121200322 is a wasteful number, since it uses less digits than its factorization.

21121200322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560600163.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21121200322 its reverse (22300212112), we get a palindrome (43421412434).

The spelling of 21121200322 in words is "twenty-one billion, one hundred twenty-one million, two hundred thousand, three hundred twenty-two".