221023032012 has 36 divisors (see below), whose sum is σ = 582988289520. Its totient is φ = 70471111392.

The previous prime is 221023031993. The next prime is 221023032047. The reversal of 221023032012 is 210230320122.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133467187 + ... + 133468842.

Almost surely, 2^221023032012 is an apocalyptic number.

It is an amenable number.

221023032012 is an abundant number, since it is smaller than the sum of its proper divisors (361965257508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221023032012 is a wasteful number, since it uses less digits than its factorization.

221023032012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266936062 (or 266936057 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 221023032012 its reverse (210230320122), we get a palindrome (431253352134).

It can be divided in two parts, 2 and 21023032012, that multiplied together give a palindrome (42046064024).

The spelling of 221023032012 in words is "two hundred twenty-one billion, twenty-three million, thirty-two thousand, twelve".