212112002021021 has 16 divisors (see below), whose sum is σ = 214910912451840. Its totient is φ = 209315967194880.

The previous prime is 212112002020993. The next prime is 212112002021053. The reversal of 212112002021021 is 120120200211212.

It is a cyclic number.

It is not a de Polignac number, because 212112002021021 - 2⁶ = 212112002020957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112002026021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1294776206 + ... + 1294940016.

It is an arithmetic number, because the mean of its divisors is an integer number (13431932028240).

Almost surely, 2^{212112002021021} is an apocalyptic number.

It is an amenable number.

212112002021021 is a deficient number, since it is larger than the sum of its proper divisors (2798910430819).

212112002021021 is a wasteful number, since it uses less digits than its factorization.

212112002021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172484.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212112002021021 its reverse (120120200211212), we get a palindrome (332232202232233).

The spelling of 212112002021021 in words is "two hundred twelve trillion, one hundred twelve billion, two million, twenty-one thousand, twenty-one".