221220033012 has 48 divisors (see below), whose sum is σ = 625672824000. Its totient is φ = 67036373280.

The previous prime is 221220032993. The next prime is 221220033037. The reversal of 221220033012 is 210330022122.

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

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, 93104887 + ... + 93107262.

It is an arithmetic number, because the mean of its divisors is an integer number (13034850500).

Almost surely, 2^221220033012 is an apocalyptic number.

221220033012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221220033012 is an abundant number, since it is smaller than the sum of its proper divisors (404452790988).

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

221220033012 is a wasteful number, since it uses less digits than its factorization.

221220033012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186212173 (or 186212165 counting only the distinct ones).

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

Adding to 221220033012 its reverse (210330022122), we get a palindrome (431550055134).

The spelling of 221220033012 in words is "two hundred twenty-one billion, two hundred twenty million, thirty-three thousand, twelve".