21031200022 has 16 divisors (see below), whose sum is σ = 36215165952. Its totient is φ = 8972951400.

The previous prime is 21031200019. The next prime is 21031200061. The reversal of 21031200022 is 22000213012.

It is a super-2 number, since 2×21031200022² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21031199975 and 21031200011.

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 7 ways as a sum of consecutive naturals, for example, 3365104 + ... + 3371347.

It is an arithmetic number, because the mean of its divisors is an integer number (2263447872).

Almost surely, 2^21031200022 is an apocalyptic number.

21031200022 is a deficient number, since it is larger than the sum of its proper divisors (15183965930).

21031200022 is a wasteful number, since it uses less digits than its factorization.

21031200022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6736683.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21031200022 its reverse (22000213012), we get a palindrome (43031413034).

The spelling of 21031200022 in words is "twenty-one billion, thirty-one million, two hundred thousand, twenty-two".