22221221212002 has 32 divisors (see below), whose sum is σ = 44461082635200. Its totient is φ = 7403967627840.

The previous prime is 22221221211991. The next prime is 22221221212009. The reversal of 22221221212002 is 20021212212222.

It is a self number, because there is not a number n which added to its sum of digits gives 22221221212002.

It is not an unprimeable number, because it can be changed into a prime (22221221212009) 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, 162190624 + ... + 162327572.

It is an arithmetic number, because the mean of its divisors is an integer number (1389408832350).

Almost surely, 2^{22221221212002} is an apocalyptic number.

22221221212002 is an abundant number, since it is smaller than the sum of its proper divisors (22239861423198).

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

22221221212002 is a wasteful number, since it uses less digits than its factorization.

22221221212002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148098.

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

Adding to 22221221212002 its reverse (20021212212222), we get a palindrome (42242433424224).

The spelling of 22221221212002 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred twelve thousand, two".