21002011212110 has 8 divisors (see below), whose sum is σ = 37803620181816. Its totient is φ = 8400804484840.

The previous prime is 21002011212101. The next prime is 21002011212113. The reversal of 21002011212110 is 1121211020012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002011212113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050100560596 + ... + 1050100560615.

It is an arithmetic number, because the mean of its divisors is an integer number (4725452522727).

Almost surely, 2^{21002011212110} is an apocalyptic number.

21002011212110 is a deficient number, since it is larger than the sum of its proper divisors (16801608969706).

21002011212110 is a wasteful number, since it uses less digits than its factorization.

21002011212110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100201121218.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21002011212110 its reverse (1121211020012), we get a palindrome (22123222232122).

The spelling of 21002011212110 in words is "twenty-one trillion, two billion, eleven million, two hundred twelve thousand, one hundred ten".