213001111 has 4 divisors (see below), whose sum is σ = 213090952. Its totient is φ = 212911272.

The previous prime is 213001073. The next prime is 213001121. The reversal of 213001111 is 111100312.

213001111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 213001111 - 2¹³ = 212992919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213001121) 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, 41265 + ... + 46138.

It is an arithmetic number, because the mean of its divisors is an integer number (53272738).

Almost surely, 2^213001111 is an apocalyptic number.

213001111 is a deficient number, since it is larger than the sum of its proper divisors (89841).

213001111 is an equidigital number, since it uses as much as digits as its factorization.

213001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89840.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 213001111 is about 14594.5575815096. The cubic root of 213001111 is about 597.2103003212.

Adding to 213001111 its reverse (111100312), we get a palindrome (324101423).

The spelling of 213001111 in words is "two hundred thirteen million, one thousand, one hundred eleven".