212454105023 has 32 divisors (see below), whose sum is σ = 224726295552. Its totient is φ = 200462169600.

The previous prime is 212454105013. The next prime is 212454105047. The reversal of 212454105023 is 320501454212.

It is a cyclic number.

It is not a de Polignac number, because 212454105023 - 2⁶ = 212454104959 is a prime.

It is a super-2 number, since 2×212454105023² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212454105013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 436250486 + ... + 436250972.

It is an arithmetic number, because the mean of its divisors is an integer number (7022696736).

Almost surely, 2^212454105023 is an apocalyptic number.

212454105023 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

212454105023 is a deficient number, since it is larger than the sum of its proper divisors (12272190529).

212454105023 is a wasteful number, since it uses less digits than its factorization.

212454105023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 212454105023 its reverse (320501454212), we get a palindrome (532955559235).

The spelling of 212454105023 in words is "two hundred twelve billion, four hundred fifty-four million, one hundred five thousand, twenty-three".