213121322031 has 8 divisors (see below), whose sum is σ = 288164041344. Its totient is φ = 140079742040.

The previous prime is 213121322017. The next prime is 213121322033. The reversal of 213121322031 is 130223121312.

213121322031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 213121322031 - 2²⁹ = 212584451119 is a prime.

It is a super-2 number, since 2×213121322031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213121321989 and 213121322007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213121322033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500284581 + ... + 500285006.

It is an arithmetic number, because the mean of its divisors is an integer number (36020505168).

Almost surely, 2^213121322031 is an apocalyptic number.

213121322031 is a deficient number, since it is larger than the sum of its proper divisors (75042719313).

213121322031 is a wasteful number, since it uses less digits than its factorization.

213121322031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000569661.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213121322031 its reverse (130223121312), we get a palindrome (343344443343).

The spelling of 213121322031 in words is "two hundred thirteen billion, one hundred twenty-one million, three hundred twenty-two thousand, thirty-one".