21212021000210 has 16 divisors (see below), whose sum is σ = 38182455832896. Its totient is φ = 8484626615088.

The previous prime is 21212021000189. The next prime is 21212021000231. The reversal of 21212021000210 is 1200012021212.

It is an interprime number because it is at equal distance from previous prime (21212021000189) and next prime (21212021000231).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22232534 + ... + 23166993.

It is an arithmetic number, because the mean of its divisors is an integer number (2386403489556).

Almost surely, 2^{21212021000210} is an apocalyptic number.

21212021000210 is a deficient number, since it is larger than the sum of its proper divisors (16970434832686).

21212021000210 is a wasteful number, since it uses less digits than its factorization.

21212021000210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45446257.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21212021000210 its reverse (1200012021212), we get a palindrome (22412033021422).

The spelling of 21212021000210 in words is "twenty-one trillion, two hundred twelve billion, twenty-one million, two hundred ten", and thus it is an aban number.