212100212011 has 4 divisors (see below), whose sum is σ = 212678142112. Its totient is φ = 211522281912.

The previous prime is 212100211991. The next prime is 212100212041. The reversal of 212100212011 is 110212001212.

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 212100212011 - 2¹⁵ = 212100179243 is a prime.

It is a super-2 number, since 2×212100212011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212100211982 and 212100212000.

It is not an unprimeable number, because it can be changed into a prime (212100212041) 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, 288964500 + ... + 288965233.

It is an arithmetic number, because the mean of its divisors is an integer number (53169535528).

Almost surely, 2^212100212011 is an apocalyptic number.

212100212011 is a deficient number, since it is larger than the sum of its proper divisors (577930101).

212100212011 is an equidigital number, since it uses as much as digits as its factorization.

212100212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577930100.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212100212011 its reverse (110212001212), we get a palindrome (322312213223).

The spelling of 212100212011 in words is "two hundred twelve billion, one hundred million, two hundred twelve thousand, eleven".