213011311 has 2 divisors, whose sum is σ = 213011312. Its totient is φ = 213011310.

The previous prime is 213011287. The next prime is 213011317. The reversal of 213011311 is 113110312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213011311 is a prime.

It is a super-2 number, since 2×213011311² = 90747637227877442, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213011291 and 213011300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213011317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106505655 + 106505656.

It is an arithmetic number, because the mean of its divisors is an integer number (106505656).

Almost surely, 2^213011311 is an apocalyptic number.

213011311 is a deficient number, since it is larger than the sum of its proper divisors (1).

213011311 is an equidigital number, since it uses as much as digits as its factorization.

213011311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 213011311 is about 14594.9070226569. The cubic root of 213011311 is about 597.2198330537.

Adding to 213011311 its reverse (113110312), we get a palindrome (326121623).

Subtracting from 213011311 its reverse (113110312), we obtain a palindrome (99900999).

The spelling of 213011311 in words is "two hundred thirteen million, eleven thousand, three hundred eleven".