212120102011 has 4 divisors (see below), whose sum is σ = 212198291272. Its totient is φ = 212041912752.

The previous prime is 212120102009. The next prime is 212120102017. The reversal of 212120102011 is 110201021212.

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 212120102011 - 2¹ = 212120102009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212120101982 and 212120102000.

It is not an unprimeable number, because it can be changed into a prime (212120102017) 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, 39090561 + ... + 39095986.

It is an arithmetic number, because the mean of its divisors is an integer number (53049572818).

Almost surely, 2^212120102011 is an apocalyptic number.

212120102011 is a deficient number, since it is larger than the sum of its proper divisors (78189261).

212120102011 is an equidigital number, since it uses as much as digits as its factorization.

212120102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78189260.

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

Adding to 212120102011 its reverse (110201021212), we get a palindrome (322321123223).

The spelling of 212120102011 in words is "two hundred twelve billion, one hundred twenty million, one hundred two thousand, eleven".