21201021101002 has 16 divisors (see below), whose sum is σ = 32898739472640. Its totient is φ = 10234788016432.

The previous prime is 21201021100991. The next prime is 21201021101003. The reversal of 21201021101002 is 20010112010212.

It is not an unprimeable number, because it can be changed into a prime (21201021101003) 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, 135058 + ... + 6513085.

It is an arithmetic number, because the mean of its divisors is an integer number (2056171217040).

Almost surely, 2^{21201021101002} is an apocalyptic number.

21201021101002 is a deficient number, since it is larger than the sum of its proper divisors (11697718371638).

21201021101002 is a wasteful number, since it uses less digits than its factorization.

21201021101002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6703157.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21201021101002 its reverse (20010112010212), we get a palindrome (41211133111214).

The spelling of 21201021101002 in words is "twenty-one trillion, two hundred one billion, twenty-one million, one hundred one thousand, two".