21000211102002 has 16 divisors (see below), whose sum is σ = 45818642404512. Its totient is φ = 6363700333920.

The previous prime is 21000211101997. The next prime is 21000211102063. The reversal of 21000211102002 is 20020111200012.

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, 159092508283 + ... + 159092508414.

It is an arithmetic number, because the mean of its divisors is an integer number (2863665150282).

Almost surely, 2^{21000211102002} is an apocalyptic number.

21000211102002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21000211102002 is an abundant number, since it is smaller than the sum of its proper divisors (24818431302510).

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

21000211102002 is a wasteful number, since it uses less digits than its factorization.

21000211102002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318185016713.

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

Adding to 21000211102002 its reverse (20020111200012), we get a palindrome (41020322302014).

It can be divided in two parts, 2100021 and 1102002, that added together give a palindrome (3202023).

The spelling of 21000211102002 in words is "twenty-one trillion, two hundred eleven million, one hundred two thousand, two".