212021122021111 has 8 divisors (see below), whose sum is σ = 228339357570800. Its totient is φ = 195704160538752.

The previous prime is 212021122021069. The next prime is 212021122021157. The reversal of 212021122021111 is 111120221120212.

It is a happy number.

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 212021122021111 - 2⁹ = 212021122020599 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 (212021122027111) 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, 318171186 + ... + 318836863.

It is an arithmetic number, because the mean of its divisors is an integer number (28542419696350).

Almost surely, 2^{212021122021111} is an apocalyptic number.

212021122021111 is a deficient number, since it is larger than the sum of its proper divisors (16318235549689).

212021122021111 is a wasteful number, since it uses less digits than its factorization.

212021122021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637033665.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 212021122021111 its reverse (111120221120212), we get a palindrome (323141343141323).

The spelling of 212021122021111 in words is "two hundred twelve trillion, twenty-one billion, one hundred twenty-two million, twenty-one thousand, one hundred eleven".