212001020121001 has 4 divisors (see below), whose sum is σ = 212182062837904. Its totient is φ = 211819977404100.

The previous prime is 212001020120977. The next prime is 212001020121061. The reversal of 212001020121001 is 100121020100212.

212001020121001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 212001020121001 - 2⁹ = 212001020120489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212001020121061) 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, 90521356695 + ... + 90521359036.

It is an arithmetic number, because the mean of its divisors is an integer number (53045515709476).

Almost surely, 2^{212001020121001} is an apocalyptic number.

It is an amenable number.

212001020121001 is a deficient number, since it is larger than the sum of its proper divisors (181042716903).

212001020121001 is a wasteful number, since it uses less digits than its factorization.

212001020121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181042716902.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212001020121001 its reverse (100121020100212), we get a palindrome (312122040221213).

The spelling of 212001020121001 in words is "two hundred twelve trillion, one billion, twenty million, one hundred twenty-one thousand, one".