21002111211202 has 16 divisors (see below), whose sum is σ = 34377597791424. Its totient is φ = 9543495654000.

The previous prime is 21002111211167. The next prime is 21002111211227. The reversal of 21002111211202 is 20211211120012.

It is an unprimeable number.

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, 145853049 + ... + 145996972.

It is an arithmetic number, because the mean of its divisors is an integer number (2148599861964).

Almost surely, 2^{21002111211202} is an apocalyptic number.

21002111211202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21002111211202 is a deficient number, since it is larger than the sum of its proper divisors (13375486580222).

21002111211202 is a wasteful number, since it uses less digits than its factorization.

21002111211202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291853305.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21002111211202 its reverse (20211211120012), we get a palindrome (41213322331214).

The spelling of 21002111211202 in words is "twenty-one trillion, two billion, one hundred eleven million, two hundred eleven thousand, two hundred two".