21202211320 has 16 divisors (see below), whose sum is σ = 47704975560. Its totient is φ = 8480884512.

The previous prime is 21202211311. The next prime is 21202211333. The reversal of 21202211320 is 2311220212.

It is a happy number.

It is a super-2 number, since 2×21202211320² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21202211294 and 21202211303.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265027602 + ... + 265027681.

Almost surely, 2^21202211320 is an apocalyptic number.

21202211320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202211320 is an abundant number, since it is smaller than the sum of its proper divisors (26502764240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21202211320 is a wasteful number, since it uses less digits than its factorization.

21202211320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530055294 (or 530055290 counting only the distinct ones).

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

Adding to 21202211320 its reverse (2311220212), we get a palindrome (23513431532).

The spelling of 21202211320 in words is "twenty-one billion, two hundred two million, two hundred eleven thousand, three hundred twenty".