212013131 has 4 divisors (see below), whose sum is σ = 231287064. Its totient is φ = 192739200.

The previous prime is 212013121. The next prime is 212013133. The reversal of 212013131 is 131310212.

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 212013131 - 2²⁶ = 144904267 is a prime.

It is a super-2 number, since 2×212013131² = 89899135432846322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212013133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9636950 + ... + 9636971.

It is an arithmetic number, because the mean of its divisors is an integer number (57821766).

Almost surely, 2^212013131 is an apocalyptic number.

212013131 is a deficient number, since it is larger than the sum of its proper divisors (19273933).

212013131 is a wasteful number, since it uses less digits than its factorization.

212013131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19273932.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 212013131 is about 14560.6706919702. The cubic root of 212013131 is about 596.2855063116.

Adding to 212013131 its reverse (131310212), we get a palindrome (343323343).

It can be divided in two parts, 2120 and 13131, that added together give a palindrome (15251).

The spelling of 212013131 in words is "two hundred twelve million, thirteen thousand, one hundred thirty-one".