221021022222012 has 48 divisors (see below), whose sum is σ = 528056789524992. Its totient is φ = 71930812618560.

The previous prime is 221021022221983. The next prime is 221021022222017. The reversal of 221021022222012 is 210222220120122.

It is a self number, because there is not a number n which added to its sum of digits gives 221021022222012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021022222017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1259205183 + ... + 1259380694.

It is an arithmetic number, because the mean of its divisors is an integer number (11001183115104).

Almost surely, 2^{221021022222012} is an apocalyptic number.

It is an amenable number.

221021022222012 is an abundant number, since it is smaller than the sum of its proper divisors (307035767302980).

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

221021022222012 is a wasteful number, since it uses less digits than its factorization.

221021022222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2518586058 (or 2518586056 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 221021022222012 its reverse (210222220120122), we get a palindrome (431243242342134).

The spelling of 221021022222012 in words is "two hundred twenty-one trillion, twenty-one billion, twenty-two million, two hundred twenty-two thousand, twelve".