221212321003122 has 32 divisors (see below), whose sum is σ = 452069526380544. Its totient is φ = 72131567898000.

The previous prime is 221212321003061. The next prime is 221212321003127. The reversal of 221212321003122 is 221300123212122.

It is a junction number, because it is equal to n+sod(n) for n = 221212321003092 and 221212321003101.

It is not an unprimeable number, because it can be changed into a prime (221212321003127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200485404 + ... + 201585767.

It is an arithmetic number, because the mean of its divisors is an integer number (14127172699392).

Almost surely, 2^{221212321003122} is an apocalyptic number.

221212321003122 is an abundant number, since it is smaller than the sum of its proper divisors (230857205377422).

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

221212321003122 is a wasteful number, since it uses less digits than its factorization.

221212321003122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402073174.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 221212321003122 its reverse (221300123212122), we get a palindrome (442512444215244).

The spelling of 221212321003122 in words is "two hundred twenty-one trillion, two hundred twelve billion, three hundred twenty-one million, three thousand, one hundred twenty-two".