21220012102002 has 32 divisors (see below), whose sum is σ = 48632919384192. Its totient is φ = 6046606278144.

The previous prime is 21220012102001. The next prime is 21220012102019. The reversal of 21220012102002 is 20020121002212.

It is a super-2 number, since 2×21220012102002² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21220012102001) 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, 677247583 + ... + 677278914.

It is an arithmetic number, because the mean of its divisors is an integer number (1519778730756).

Almost surely, 2^{21220012102002} is an apocalyptic number.

21220012102002 is an abundant number, since it is smaller than the sum of its proper divisors (27412907282190).

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

21220012102002 is a wasteful number, since it uses less digits than its factorization.

21220012102002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354526882.

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

Adding to 21220012102002 its reverse (20020121002212), we get a palindrome (41240133104214).

The spelling of 21220012102002 in words is "twenty-one trillion, two hundred twenty billion, twelve million, one hundred two thousand, two".