21021100000210 has 32 divisors (see below), whose sum is σ = 40077103536000. Its totient is φ = 7911186868992.

The previous prime is 21021100000189. The next prime is 21021100000231. The reversal of 21021100000210 is 1200000112012.

It is an interprime number because it is at equal distance from previous prime (21021100000189) and next prime (21021100000231).

It is a Harshad number since it is a multiple of its sum of digits (10).

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 15 ways as a sum of consecutive naturals, for example, 20105964 + ... + 21125623.

It is an arithmetic number, because the mean of its divisors is an integer number (1252409485500).

Almost surely, 2^{21021100000210} is an apocalyptic number.

21021100000210 is a deficient number, since it is larger than the sum of its proper divisors (19056003535790).

21021100000210 is a wasteful number, since it uses less digits than its factorization.

21021100000210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41234610.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21021100000210 its reverse (1200000112012), we get a palindrome (22221100112222).

The spelling of 21021100000210 in words is "twenty-one trillion, twenty-one billion, one hundred million, two hundred ten", and thus it is an aban number.