212012001000221 has 4 divisors (see below), whose sum is σ = 212012137296000. Its totient is φ = 212011864704444.

The previous prime is 212012001000203. The next prime is 212012001000223. The reversal of 212012001000221 is 122000100210212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212012001000221 - 2³⁸ = 211737123093277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212012001000196 and 212012001000205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012001000223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65787341 + ... + 68934738.

It is an arithmetic number, because the mean of its divisors is an integer number (53003034324000).

Almost surely, 2^{212012001000221} is an apocalyptic number.

It is an amenable number.

212012001000221 is a deficient number, since it is larger than the sum of its proper divisors (136295779).

212012001000221 is a wasteful number, since it uses less digits than its factorization.

212012001000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136295778.

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

Adding to 212012001000221 its reverse (122000100210212), we get a palindrome (334012101210433).

The spelling of 212012001000221 in words is "two hundred twelve trillion, twelve billion, one million, two hundred twenty-one", and thus it is an aban number.