212001200022021 has 4 divisors (see below), whose sum is σ = 282668266696032. Its totient is φ = 141334133348012.

The previous prime is 212001200022019. The next prime is 212001200022041. The reversal of 212001200022021 is 120220002100212.

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 212001200022021 - 2¹ = 212001200022019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001200022041) 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, 35333533337001 + ... + 35333533337006.

It is an arithmetic number, because the mean of its divisors is an integer number (70667066674008).

Almost surely, 2^{212001200022021} is an apocalyptic number.

It is an amenable number.

212001200022021 is a deficient number, since it is larger than the sum of its proper divisors (70667066674011).

212001200022021 is an equidigital number, since it uses as much as digits as its factorization.

212001200022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70667066674010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 212001200022021 its reverse (120220002100212), we get a palindrome (332221202122233).

The spelling of 212001200022021 in words is "two hundred twelve trillion, one billion, two hundred million, twenty-two thousand, twenty-one".