21210120010022 has 4 divisors (see below), whose sum is σ = 31815180015036. Its totient is φ = 10605060005010.

The previous prime is 21210120009931. The next prime is 21210120010081. The reversal of 21210120010022 is 22001002101212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21210120009979 and 21210120010006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5302530002504 + ... + 5302530002507.

It is an arithmetic number, because the mean of its divisors is an integer number (7953795003759).

Almost surely, 2^{21210120010022} is an apocalyptic number.

21210120010022 is a deficient number, since it is larger than the sum of its proper divisors (10605060005014).

21210120010022 is a wasteful number, since it uses less digits than its factorization.

21210120010022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10605060005013.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21210120010022 its reverse (22001002101212), we get a palindrome (43211122111234).

The spelling of 21210120010022 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty million, ten thousand, twenty-two".