221122112012 has 6 divisors (see below), whose sum is σ = 386963696028. Its totient is φ = 110561056004.

The previous prime is 221122112009. The next prime is 221122112021. The reversal of 221122112012 is 210211221122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27640263998 + ... + 27640264005.

It is an arithmetic number, because the mean of its divisors is an integer number (64493949338).

Almost surely, 2^221122112012 is an apocalyptic number.

It is an amenable number.

221122112012 is a deficient number, since it is larger than the sum of its proper divisors (165841584016).

221122112012 is a wasteful number, since it uses less digits than its factorization.

221122112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55280528007 (or 55280528005 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221122112012 its reverse (210211221122), we get a palindrome (431333333134).

The spelling of 221122112012 in words is "two hundred twenty-one billion, one hundred twenty-two million, one hundred twelve thousand, twelve".