221001122012 has 48 divisors (see below), whose sum is σ = 438700631040. Its totient is φ = 96504892800.

The previous prime is 221001121997. The next prime is 221001122039. The reversal of 221001122012 is 210221100122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404462 + ... + 778197.

It is an arithmetic number, because the mean of its divisors is an integer number (9139596480).

Almost surely, 2^221001122012 is an apocalyptic number.

221001122012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221001122012 is a deficient number, since it is larger than the sum of its proper divisors (217699509028).

221001122012 is a wasteful number, since it uses less digits than its factorization.

221001122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182842 (or 1182840 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221001122012 its reverse (210221100122), we get a palindrome (431222222134).

The spelling of 221001122012 in words is "two hundred twenty-one billion, one million, one hundred twenty-two thousand, twelve".