212121110031 has 8 divisors (see below), whose sum is σ = 297713838720. Its totient is φ = 133971227352.

The previous prime is 212121109997. The next prime is 212121110083. The reversal of 212121110031 is 130011121212.

212121110031 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 not a de Polignac number, because 212121110031 - 2¹⁵ = 212121077263 is a prime.

It is a super-2 number, since 2×212121110031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121110231) 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, 1860711435 + ... + 1860711548.

It is an arithmetic number, because the mean of its divisors is an integer number (37214229840).

Almost surely, 2^212121110031 is an apocalyptic number.

212121110031 is a deficient number, since it is larger than the sum of its proper divisors (85592728689).

212121110031 is a wasteful number, since it uses less digits than its factorization.

212121110031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3721423005.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 212121110031 its reverse (130011121212), we get a palindrome (342132231243).

The spelling of 212121110031 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred ten thousand, thirty-one".