212012221221001 has 4 divisors (see below), whose sum is σ = 214998308843904. Its totient is φ = 209026133598100.

The previous prime is 212012221220953. The next prime is 212012221221007. The reversal of 212012221221001 is 100122122210212.

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 212012221221001 - 2²¹ = 212012219123849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212012221221001.

It is not an unprimeable number, because it can be changed into a prime (212012221221007) 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, 1493043811345 + ... + 1493043811486.

It is an arithmetic number, because the mean of its divisors is an integer number (53749577210976).

Almost surely, 2^{212012221221001} is an apocalyptic number.

It is an amenable number.

212012221221001 is a deficient number, since it is larger than the sum of its proper divisors (2986087622903).

212012221221001 is an equidigital number, since it uses as much as digits as its factorization.

212012221221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2986087622902.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212012221221001 its reverse (100122122210212), we get a palindrome (312134343431213).

The spelling of 212012221221001 in words is "two hundred twelve trillion, twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, one".