213020121111 has 8 divisors (see below), whose sum is σ = 324602089344. Its totient is φ = 121725783480.

The previous prime is 213020121043. The next prime is 213020121121. The reversal of 213020121111 is 111121020312.

213020121111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213020121111 - 2¹³ = 213020112919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213020121121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5071907625 + ... + 5071907666.

It is an arithmetic number, because the mean of its divisors is an integer number (40575261168).

Almost surely, 2^213020121111 is an apocalyptic number.

213020121111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

213020121111 is a deficient number, since it is larger than the sum of its proper divisors (111581968233).

213020121111 is a wasteful number, since it uses less digits than its factorization.

213020121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10143815301.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 213020121111 its reverse (111121020312), we get a palindrome (324141141423).

The spelling of 213020121111 in words is "two hundred thirteen billion, twenty million, one hundred twenty-one thousand, one hundred eleven".