221220120132012 has 48 divisors (see below), whose sum is σ = 519503319095040. Its totient is φ = 73265715012672.

The previous prime is 221220120131999. The next prime is 221220120132017. The reversal of 221220120132012 is 210231021022122.

It is a self number, because there is not a number n which added to its sum of digits gives 221220120132012.

It is not an unprimeable number, because it can be changed into a prime (221220120132017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20190562 + ... + 29156457.

It is an arithmetic number, because the mean of its divisors is an integer number (10822985814480).

Almost surely, 2^{221220120132012} is an apocalyptic number.

It is an amenable number.

221220120132012 is an abundant number, since it is smaller than the sum of its proper divisors (298283198963028).

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

221220120132012 is a wasteful number, since it uses less digits than its factorization.

221220120132012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49349430 (or 49349428 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 221220120132012 its reverse (210231021022122), we get a palindrome (431451141154134).

The spelling of 221220120132012 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred twenty million, one hundred thirty-two thousand, twelve".