21202022222212 has 12 divisors (see below), whose sum is σ = 39957657265036. Its totient is φ = 9785548717920.

The previous prime is 21202022222207. The next prime is 21202022222219. The reversal of 21202022222212 is 21222222020212.

It can be written as a sum of positive squares in 2 ways, for example, as 7342008028996 + 13860014193216 = 2709614^2 + 3722904^2 .

It is a super-2 number, since 2×21202022222212² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21202022222219) by changing a digit.

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, 203865598239 + ... + 203865598342.

Almost surely, 2^{21202022222212} is an apocalyptic number.

It is an amenable number.

21202022222212 is a deficient number, since it is larger than the sum of its proper divisors (18755635042824).

21202022222212 is a wasteful number, since it uses less digits than its factorization.

21202022222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407731196598 (or 407731196596 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 21202022222212 its reverse (21222222020212), we get a palindrome (42424244242424).

The spelling of 21202022222212 in words is "twenty-one trillion, two hundred two billion, twenty-two million, two hundred twenty-two thousand, two hundred twelve".