212021103023 has 4 divisors (see below), whose sum is σ = 212282535528. Its totient is φ = 211759670520.

The previous prime is 212021102971. The next prime is 212021103029. The reversal of 212021103023 is 320301120212.

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 212021103023 - 2²⁰ = 212020054447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212021102992 and 212021103010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021103029) 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, 130715036 + ... + 130716657.

It is an arithmetic number, because the mean of its divisors is an integer number (53070633882).

Almost surely, 2^212021103023 is an apocalyptic number.

212021103023 is a deficient number, since it is larger than the sum of its proper divisors (261432505).

212021103023 is an equidigital number, since it uses as much as digits as its factorization.

212021103023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261432504.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 212021103023 its reverse (320301120212), we get a palindrome (532322223235).

The spelling of 212021103023 in words is "two hundred twelve billion, twenty-one million, one hundred three thousand, twenty-three".