210123213023 has 4 divisors (see below), whose sum is σ = 211211934528. Its totient is φ = 209034491520.

The previous prime is 210123213019. The next prime is 210123213029. The reversal of 210123213023 is 320312321012.

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 210123213023 - 2² = 210123213019 is a prime.

It is a super-2 number, since 2×210123213023² (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 = 210123212986 and 210123213004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210123213029) 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, 544360463 + ... + 544360848.

It is an arithmetic number, because the mean of its divisors is an integer number (52802983632).

Almost surely, 2^210123213023 is an apocalyptic number.

210123213023 is a deficient number, since it is larger than the sum of its proper divisors (1088721505).

210123213023 is a wasteful number, since it uses less digits than its factorization.

210123213023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088721504.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 210123213023 its reverse (320312321012), we get a palindrome (530435534035).

The spelling of 210123213023 in words is "two hundred ten billion, one hundred twenty-three million, two hundred thirteen thousand, twenty-three".