213111212011 has 2 divisors, whose sum is σ = 213111212012. Its totient is φ = 213111212010.

The previous prime is 213111211981. The next prime is 213111212021. The reversal of 213111212011 is 110212111312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213111212011 - 2¹⁵ = 213111179243 is a prime.

It is a super-3 number, since 3×213111212011³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (213111212021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106555606005 + 106555606006.

It is an arithmetic number, because the mean of its divisors is an integer number (106555606006).

Almost surely, 2^213111212011 is an apocalyptic number.

213111212011 is a deficient number, since it is larger than the sum of its proper divisors (1).

213111212011 is an equidigital number, since it uses as much as digits as its factorization.

213111212011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 213111212011 its reverse (110212111312), we get a palindrome (323323323323).

The spelling of 213111212011 in words is "two hundred thirteen billion, one hundred eleven million, two hundred twelve thousand, eleven".