31212000132211 has 4 divisors (see below), whose sum is σ = 31562696763000. Its totient is φ = 30861303501424.

The previous prime is 31212000132169. The next prime is 31212000132221. The reversal of 31212000132211 is 11223100021213.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31212000132211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31212000132221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175348315261 + ... + 175348315438.

It is an arithmetic number, because the mean of its divisors is an integer number (7890674190750).

Almost surely, 2^{31212000132211} is an apocalyptic number.

31212000132211 is a deficient number, since it is larger than the sum of its proper divisors (350696630789).

31212000132211 is an equidigital number, since it uses as much as digits as its factorization.

31212000132211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350696630788.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31212000132211 its reverse (11223100021213), we get a palindrome (42435100153424).

The spelling of 31212000132211 in words is "thirty-one trillion, two hundred twelve billion, one hundred thirty-two thousand, two hundred eleven".