221522045511212 has 24 divisors (see below), whose sum is σ = 398983957848000. Its totient is φ = 107571865260176.

The previous prime is 221522045511113. The next prime is 221522045511223. The reversal of 221522045511212 is 212115540225122.

221522045511212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5654514962 + ... + 5654554137.

It is an arithmetic number, because the mean of its divisors is an integer number (16624331577000).

Almost surely, 2^{221522045511212} is an apocalyptic number.

It is an amenable number.

221522045511212 is a deficient number, since it is larger than the sum of its proper divisors (177461912336788).

221522045511212 is a wasteful number, since it uses less digits than its factorization.

221522045511212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11309069245 (or 11309069243 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 35.

Adding to 221522045511212 its reverse (212115540225122), we get a palindrome (433637585736334).

The spelling of 221522045511212 in words is "two hundred twenty-one trillion, five hundred twenty-two billion, forty-five million, five hundred eleven thousand, two hundred twelve".