21210110110002 has 64 divisors (see below), whose sum is σ = 46344847538304. Its totient is φ = 6417831383040.

The previous prime is 21210110109973. The next prime is 21210110110043. The reversal of 21210110110002 is 20001101101212.

It is a self number, because there is not a number n which added to its sum of digits gives 21210110110002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 253131538 + ... + 253215314.

It is an arithmetic number, because the mean of its divisors is an integer number (724138242786).

Almost surely, 2^{21210110110002} is an apocalyptic number.

21210110110002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21210110110002 is an abundant number, since it is smaller than the sum of its proper divisors (25134737428302).

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

21210110110002 is a wasteful number, since it uses less digits than its factorization.

21210110110002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89403.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21210110110002 its reverse (20001101101212), we get a palindrome (41211211211214).

The spelling of 21210110110002 in words is "twenty-one trillion, two hundred ten billion, one hundred ten million, one hundred ten thousand, two".