221211122204 has 6 divisors (see below), whose sum is σ = 387119463864. Its totient is φ = 110605561100.

The previous prime is 221211122183. The next prime is 221211122267. The reversal of 221211122204 is 402221112122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27651390272 + ... + 27651390279.

It is an arithmetic number, because the mean of its divisors is an integer number (64519910644).

Almost surely, 2^221211122204 is an apocalyptic number.

It is an amenable number.

221211122204 is a deficient number, since it is larger than the sum of its proper divisors (165908341660).

221211122204 is a wasteful number, since it uses less digits than its factorization.

221211122204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55302780555 (or 55302780553 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221211122204 its reverse (402221112122), we get a palindrome (623432234326).

The spelling of 221211122204 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred twenty-two thousand, two hundred four".