21202022012 has 12 divisors (see below), whose sum is σ = 38716736016. Its totient is φ = 10140097440.

The previous prime is 21202021999. The next prime is 21202022029. The reversal of 21202022012 is 21022020212.

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 in 3 ways as a sum of consecutive naturals, for example, 115228289 + ... + 115228472.

It is an arithmetic number, because the mean of its divisors is an integer number (3226394668).

Almost surely, 2^21202022012 is an apocalyptic number.

It is an amenable number.

21202022012 is a deficient number, since it is larger than the sum of its proper divisors (17514714004).

21202022012 is a wasteful number, since it uses less digits than its factorization.

21202022012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230456788 (or 230456786 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21202022012 its reverse (21022020212), we get a palindrome (42224042224).

The spelling of 21202022012 in words is "twenty-one billion, two hundred two million, twenty-two thousand, twelve".