22121020002 has 32 divisors (see below), whose sum is σ = 44893989504. Its totient is φ = 7265148800.

The previous prime is 22121020001. The next prime is 22121020027. The reversal of 22121020002 is 20002012122.

It is a self number, because there is not a number n which added to its sum of digits gives 22121020002.

It is not an unprimeable number, because it can be changed into a prime (22121020001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 681502 + ... + 713222.

It is an arithmetic number, because the mean of its divisors is an integer number (1402937172).

Almost surely, 2^22121020002 is an apocalyptic number.

22121020002 is an abundant number, since it is smaller than the sum of its proper divisors (22772969502).

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

22121020002 is a wasteful number, since it uses less digits than its factorization.

22121020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33434.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22121020002 its reverse (20002012122), we get a palindrome (42123032124).

The spelling of 22121020002 in words is "twenty-two billion, one hundred twenty-one million, twenty thousand, two".