21001102102002 has 16 divisors (see below), whose sum is σ = 45820586404512. Its totient is φ = 6363970333920.

The previous prime is 21001102101929. The next prime is 21001102102031. The reversal of 21001102102002 is 20020120110012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159099258283 + ... + 159099258414.

It is an arithmetic number, because the mean of its divisors is an integer number (2863786650282).

Almost surely, 2^{21001102102002} is an apocalyptic number.

21001102102002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21001102102002 is an abundant number, since it is smaller than the sum of its proper divisors (24819484302510).

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

21001102102002 is a wasteful number, since it uses less digits than its factorization.

21001102102002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318198516713.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21001102102002 its reverse (20020120110012), we get a palindrome (41021222212014).

The spelling of 21001102102002 in words is "twenty-one trillion, one billion, one hundred two million, one hundred two thousand, two".