212021100030111 has 4 divisors (see below), whose sum is σ = 282694800040152. Its totient is φ = 141347400020072.

The previous prime is 212021100029989. The next prime is 212021100030119. The reversal of 212021100030111 is 111030001120212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212021100030111 - 2¹¹ = 212021100028063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021100030119) 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, 35336850005016 + ... + 35336850005021.

It is an arithmetic number, because the mean of its divisors is an integer number (70673700010038).

Almost surely, 2^{212021100030111} is an apocalyptic number.

212021100030111 is a deficient number, since it is larger than the sum of its proper divisors (70673700010041).

212021100030111 is an equidigital number, since it uses as much as digits as its factorization.

212021100030111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70673700010040.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 212021100030111 its reverse (111030001120212), we get a palindrome (323051101150323).

The spelling of 212021100030111 in words is "two hundred twelve trillion, twenty-one billion, one hundred million, thirty thousand, one hundred eleven".