213211133129 has 4 divisors (see below), whose sum is σ = 213515286660. Its totient is φ = 212906979600.

The previous prime is 213211133119. The next prime is 213211133243. The reversal of 213211133129 is 921331112312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80073718729 + 133137414400 = 282973^2 + 364880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213211133129 is a prime.

It is a super-2 number, since 2×213211133129² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213211133119) 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, 152075714 + ... + 152077115.

It is an arithmetic number, because the mean of its divisors is an integer number (53378821665).

Almost surely, 2^213211133129 is an apocalyptic number.

It is an amenable number.

213211133129 is a deficient number, since it is larger than the sum of its proper divisors (304153531).

213211133129 is an equidigital number, since it uses as much as digits as its factorization.

213211133129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304153530.

The product of its digits is 1944, while the sum is 29.

The spelling of 213211133129 in words is "two hundred thirteen billion, two hundred eleven million, one hundred thirty-three thousand, one hundred twenty-nine".