21221202010002 has 16 divisors (see below), whose sum is σ = 43429436672160. Its totient is φ = 6909228561312.

The previous prime is 21221202009983. The next prime is 21221202010009. The reversal of 21221202010002 is 20001020212212.

It is not an unprimeable number, because it can be changed into a prime (21221202010009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41126360227 + ... + 41126360742.

It is an arithmetic number, because the mean of its divisors is an integer number (2714339792010).

Almost surely, 2^{21221202010002} is an apocalyptic number.

21221202010002 is an abundant number, since it is smaller than the sum of its proper divisors (22208234662158).

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

21221202010002 is a wasteful number, since it uses less digits than its factorization.

21221202010002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82252721017.

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

Adding to 21221202010002 its reverse (20001020212212), we get a palindrome (41222222222214).

The spelling of 21221202010002 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred two million, ten thousand, two".