221050502543212 has 12 divisors (see below), whose sum is σ = 409593578241960. Its totient is φ = 104023765902656.

The previous prime is 221050502543209. The next prime is 221050502543243. The reversal of 221050502543212 is 212345205050122.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1625371342162 + ... + 1625371342297.

It is an arithmetic number, because the mean of its divisors is an integer number (34132798186830).

Almost surely, 2^{221050502543212} is an apocalyptic number.

It is an amenable number.

221050502543212 is a deficient number, since it is larger than the sum of its proper divisors (188543075698748).

221050502543212 is a wasteful number, since it uses less digits than its factorization.

221050502543212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3250742684480 (or 3250742684478 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 221050502543212 its reverse (212345205050122), we get a palindrome (433395707593334).

The spelling of 221050502543212 in words is "two hundred twenty-one trillion, fifty billion, five hundred two million, five hundred forty-three thousand, two hundred twelve".