212102002110021 has 32 divisors (see below), whose sum is σ = 300993715503360. Its totient is φ = 132392252473344.

The previous prime is 212102002110007. The next prime is 212102002110067. The reversal of 212102002110021 is 120011200201212.

It is not a de Polignac number, because 212102002110021 - 2³⁵ = 212067642371653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102002130021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1410712176 + ... + 1410862518.

It is an arithmetic number, because the mean of its divisors is an integer number (9406053609480).

Almost surely, 2^{212102002110021} is an apocalyptic number.

It is an amenable number.

212102002110021 is a deficient number, since it is larger than the sum of its proper divisors (88891713393339).

212102002110021 is a wasteful number, since it uses less digits than its factorization.

212102002110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293885.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212102002110021 its reverse (120011200201212), we get a palindrome (332113202311233).

The spelling of 212102002110021 in words is "two hundred twelve trillion, one hundred two billion, two million, one hundred ten thousand, twenty-one".