212100191011 has 4 divisors (see below), whose sum is σ = 212109772000. Its totient is φ = 212090610024.

The previous prime is 212100190999. The next prime is 212100191029. The reversal of 212100191011 is 110191001212.

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 212100191011 - 2¹⁵ = 212100158243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212100191011.

It is not an unprimeable number, because it can be changed into a prime (212100191071) 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, 4757211 + ... + 4801588.

It is an arithmetic number, because the mean of its divisors is an integer number (53027443000).

Almost surely, 2^212100191011 is an apocalyptic number.

212100191011 is a deficient number, since it is larger than the sum of its proper divisors (9580989).

212100191011 is an equidigital number, since it uses as much as digits as its factorization.

212100191011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9580988.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 212100191011 its reverse (110191001212), we get a palindrome (322291192223).

The spelling of 212100191011 in words is "two hundred twelve billion, one hundred million, one hundred ninety-one thousand, eleven".