212420023 has 4 divisors (see below), whose sum is σ = 212627088. Its totient is φ = 212212960.

The previous prime is 212420003. The next prime is 212420027. The reversal of 212420023 is 320024212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212420023 - 2⁹ = 212419511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212419979 and 212420006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212420027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101986 + ... + 104047.

It is an arithmetic number, because the mean of its divisors is an integer number (53156772).

Almost surely, 2^212420023 is an apocalyptic number.

212420023 is a deficient number, since it is larger than the sum of its proper divisors (207065).

212420023 is a wasteful number, since it uses less digits than its factorization.

212420023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207064.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 212420023 is about 14574.6362904877. The cubic root of 212420023 is about 596.6667228794. Note that the first 3 decimals are identical.

Adding to 212420023 its reverse (320024212), we get a palindrome (532444235).

The spelling of 212420023 in words is "two hundred twelve million, four hundred twenty thousand, twenty-three".