212133131 has 8 divisors (see below), whose sum is σ = 243341280. Its totient is φ = 181150848.

The previous prime is 212133127. The next prime is 212133149. The reversal of 212133131 is 131331212.

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

It is a cyclic number.

It is not a de Polignac number, because 212133131 - 2² = 212133127 is a prime.

It is a super-2 number, since 2×212133131² = 90000930535726322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212133101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54446 + ... + 58211.

It is an arithmetic number, because the mean of its divisors is an integer number (30417660).

Almost surely, 2^212133131 is an apocalyptic number.

212133131 is a deficient number, since it is larger than the sum of its proper divisors (31208149).

212133131 is a wasteful number, since it uses less digits than its factorization.

212133131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112933.

The product of its digits is 108, while the sum is 17.

The square root of 212133131 is about 14564.7907983603. The cubic root of 212133131 is about 596.3979848245.

Adding to 212133131 its reverse (131331212), we get a palindrome (343464343).

The spelling of 212133131 in words is "two hundred twelve million, one hundred thirty-three thousand, one hundred thirty-one".