212331231129 has 4 divisors (see below), whose sum is σ = 283108308176. Its totient is φ = 141554154084.

The previous prime is 212331231113. The next prime is 212331231149. The reversal of 212331231129 is 921132133212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 212331231129 - 2⁴ = 212331231113 is a prime.

It is a super-2 number, since 2×212331231129² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212331231096 and 212331231105.

It is not an unprimeable number, because it can be changed into a prime (212331231149) 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, 35388538519 + ... + 35388538524.

It is an arithmetic number, because the mean of its divisors is an integer number (70777077044).

Almost surely, 2^212331231129 is an apocalyptic number.

It is an amenable number.

212331231129 is a deficient number, since it is larger than the sum of its proper divisors (70777077047).

212331231129 is an equidigital number, since it uses as much as digits as its factorization.

212331231129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70777077046.

The product of its digits is 3888, while the sum is 30.

The spelling of 212331231129 in words is "two hundred twelve billion, three hundred thirty-one million, two hundred thirty-one thousand, one hundred twenty-nine".