212211132332021 has 4 divisors (see below), whose sum is σ = 212354228174592. Its totient is φ = 212068036489452.

The previous prime is 212211132331999. The next prime is 212211132332027. The reversal of 212211132332021 is 120233231112212.

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 a de Polignac number, because none of the positive numbers 2^k-212211132332021 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 (212211132332027) 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, 71547919061 + ... + 71547922026.

It is an arithmetic number, because the mean of its divisors is an integer number (53088557043648).

Almost surely, 2^{212211132332021} is an apocalyptic number.

It is an amenable number.

212211132332021 is a deficient number, since it is larger than the sum of its proper divisors (143095842571).

212211132332021 is a wasteful number, since it uses less digits than its factorization.

212211132332021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143095842570.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 212211132332021 its reverse (120233231112212), we get a palindrome (332444363444233).

The spelling of 212211132332021 in words is "two hundred twelve trillion, two hundred eleven billion, one hundred thirty-two million, three hundred thirty-two thousand, twenty-one".