221422310212 has 6 divisors (see below), whose sum is σ = 387489042878. Its totient is φ = 110711155104.

The previous prime is 221422310183. The next prime is 221422310227. The reversal of 221422310212 is 212013224122.

It can be written as a sum of positive squares in only one way, i.e., 135088591936 + 86333718276 = 367544^2 + 293826^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27677788773 + ... + 27677788780.

Almost surely, 2^221422310212 is an apocalyptic number.

It is an amenable number.

221422310212 is a deficient number, since it is larger than the sum of its proper divisors (166066732666).

221422310212 is a wasteful number, since it uses less digits than its factorization.

221422310212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55355577557 (or 55355577555 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 221422310212 its reverse (212013224122), we get a palindrome (433435534334).

The spelling of 221422310212 in words is "two hundred twenty-one billion, four hundred twenty-two million, three hundred ten thousand, two hundred twelve".