21220101220002 has 32 divisors (see below), whose sum is σ = 42813481471488. Its totient is φ = 7011426170496.

The previous prime is 21220101220001. The next prime is 21220101220009. The reversal of 21220101220002 is 20002210102212.

It is not an unprimeable number, because it can be changed into a prime (21220101220001) 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, 33721653 + ... + 34345160.

It is an arithmetic number, because the mean of its divisors is an integer number (1337921295984).

Almost surely, 2^{21220101220002} is an apocalyptic number.

21220101220002 is an abundant number, since it is smaller than the sum of its proper divisors (21593380251486).

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

21220101220002 is a wasteful number, since it uses less digits than its factorization.

21220101220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68067274.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21220101220002 its reverse (20002210102212), we get a palindrome (41222311322214).

The spelling of 21220101220002 in words is "twenty-one trillion, two hundred twenty billion, one hundred one million, two hundred twenty thousand, two".