212123212031 has 8 divisors (see below), whose sum is σ = 213066061824. Its totient is φ = 211181395320.

The previous prime is 212123211959. The next prime is 212123212079. The reversal of 212123212031 is 130212321212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212123212031 is a prime.

It is a super-2 number, since 2×212123212031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212123211994 and 212123212012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212123218031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154766 + ... + 669476.

It is an arithmetic number, because the mean of its divisors is an integer number (26633257728).

Almost surely, 2^212123212031 is an apocalyptic number.

212123212031 is a deficient number, since it is larger than the sum of its proper divisors (942849793).

212123212031 is a wasteful number, since it uses less digits than its factorization.

212123212031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516541.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212123212031 its reverse (130212321212), we get a palindrome (342335533243).

The spelling of 212123212031 in words is "two hundred twelve billion, one hundred twenty-three million, two hundred twelve thousand, thirty-one".