312213101132021 has 2 divisors, whose sum is σ = 312213101132022. Its totient is φ = 312213101132020.

The previous prime is 312213101132003. The next prime is 312213101132041. The reversal of 312213101132021 is 120231101312213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 295051046702500 + 17162054429521 = 17177050^2 + 4142711^2 .

It is a cyclic number.

It is not a de Polignac number, because 312213101132021 - 2⁴² = 307815054620917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312213101132041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156106550566010 + 156106550566011.

It is an arithmetic number, because the mean of its divisors is an integer number (156106550566011).

Almost surely, 2^{312213101132021} is an apocalyptic number.

It is an amenable number.

312213101132021 is a deficient number, since it is larger than the sum of its proper divisors (1).

312213101132021 is an equidigital number, since it uses as much as digits as its factorization.

312213101132021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 312213101132021 its reverse (120231101312213), we get a palindrome (432444202444234).

The spelling of 312213101132021 in words is "three hundred twelve trillion, two hundred thirteen billion, one hundred one million, one hundred thirty-two thousand, twenty-one".