21002111120210 has 64 divisors (see below), whose sum is σ = 41918348803968. Its totient is φ = 7511616000000.

The previous prime is 21002111120189. The next prime is 21002111120299. The reversal of 21002111120210 is 1202111120012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208301810 + ... + 208402610.

It is an arithmetic number, because the mean of its divisors is an integer number (654974200062).

Almost surely, 2^{21002111120210} is an apocalyptic number.

21002111120210 is a deficient number, since it is larger than the sum of its proper divisors (20916237683758).

21002111120210 is a wasteful number, since it uses less digits than its factorization.

21002111120210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131931.

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

Adding to 21002111120210 its reverse (1202111120012), we get a palindrome (22204222240222).

The spelling of 21002111120210 in words is "twenty-one trillion, two billion, one hundred eleven million, one hundred twenty thousand, two hundred ten".