212001112220021 has 8 divisors (see below), whose sum is σ = 212069663602944. Its totient is φ = 211932571886640.

The previous prime is 212001112219961. The next prime is 212001112220069. The reversal of 212001112220021 is 120022211100212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212001112220021 - 2⁶ = 212001112219957 is a prime.

It is a super-2 number, since 2×212001112220021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001112220071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35703176 + ... + 41215518.

It is an arithmetic number, because the mean of its divisors is an integer number (26508707950368).

Almost surely, 2^{212001112220021} is an apocalyptic number.

It is an amenable number.

212001112220021 is a deficient number, since it is larger than the sum of its proper divisors (68551382923).

212001112220021 is an equidigital number, since it uses as much as digits as its factorization.

212001112220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5524771.

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

Adding to 212001112220021 its reverse (120022211100212), we get a palindrome (332023323320233).

The spelling of 212001112220021 in words is "two hundred twelve trillion, one billion, one hundred twelve million, two hundred twenty thousand, twenty-one".