221200123012 has 24 divisors (see below), whose sum is σ = 431276065920. Its totient is φ = 98406243360.

The previous prime is 221200122989. The next prime is 221200123013. The reversal of 221200123012 is 210321002122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221200123013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53479587 + ... + 53483722.

It is an arithmetic number, because the mean of its divisors is an integer number (17969836080).

Almost surely, 2^221200123012 is an apocalyptic number.

221200123012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221200123012 is a deficient number, since it is larger than the sum of its proper divisors (210075942908).

221200123012 is a wasteful number, since it uses less digits than its factorization.

221200123012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106963371 (or 106963369 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 221200123012 its reverse (210321002122), we get a palindrome (431521125134).

The spelling of 221200123012 in words is "two hundred twenty-one billion, two hundred million, one hundred twenty-three thousand, twelve".