212001122210021 has 8 divisors (see below), whose sum is σ = 216931865230080. Its totient is φ = 207070401206592.

The previous prime is 212001122209997. The next prime is 212001122210029. The reversal of 212001122210021 is 120012221100212.

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 212001122210021 - 2¹⁸ = 212001121947877 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 (212001122210029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14842685 + ... + 25383213.

It is an arithmetic number, because the mean of its divisors is an integer number (27116483153760).

Almost surely, 2^{212001122210021} is an apocalyptic number.

It is an amenable number.

212001122210021 is a deficient number, since it is larger than the sum of its proper divisors (4930743020059).

212001122210021 is a wasteful number, since it uses less digits than its factorization.

212001122210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11008315.

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

Adding to 212001122210021 its reverse (120012221100212), we get a palindrome (332013343310233).

The spelling of 212001122210021 in words is "two hundred twelve trillion, one billion, one hundred twenty-two million, two hundred ten thousand, twenty-one".