311212100023021 has 8 divisors (see below), whose sum is σ = 317834008053120. Its totient is φ = 304590207575808.

The previous prime is 311212100023009. The next prime is 311212100023049. The reversal of 311212100023021 is 120320001212113.

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 311212100023021 - 2⁷ = 311212100022893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311212100023021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311212100023001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42218110 + ... + 49038688.

It is an arithmetic number, because the mean of its divisors is an integer number (39729251006640).

Almost surely, 2^{311212100023021} is an apocalyptic number.

It is an amenable number.

311212100023021 is a deficient number, since it is larger than the sum of its proper divisors (6621908030099).

311212100023021 is an equidigital number, since it uses as much as digits as its factorization.

311212100023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7791443.

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

Adding to 311212100023021 its reverse (120320001212113), we get a palindrome (431532101235134).

The spelling of 311212100023021 in words is "three hundred eleven trillion, two hundred twelve billion, one hundred million, twenty-three thousand, twenty-one".