212021013023 has 4 divisors (see below), whose sum is σ = 212079634560. Its totient is φ = 211962391488.

The previous prime is 212021012911. The next prime is 212021013059. The reversal of 212021013023 is 320310120212.

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 212021013023 - 2²⁰ = 212019964447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212021012992 and 212021013010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021013073) 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, 29305343 + ... + 29312576.

It is an arithmetic number, because the mean of its divisors is an integer number (53019908640).

Almost surely, 2^212021013023 is an apocalyptic number.

212021013023 is a deficient number, since it is larger than the sum of its proper divisors (58621537).

212021013023 is an equidigital number, since it uses as much as digits as its factorization.

212021013023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58621536.

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

Adding to 212021013023 its reverse (320310120212), we get a palindrome (532331133235).

The spelling of 212021013023 in words is "two hundred twelve billion, twenty-one million, thirteen thousand, twenty-three".