210001011023 has 4 divisors (see below), whose sum is σ = 210003486000. Its totient is φ = 209998536048.

The previous prime is 210001011019. The next prime is 210001011041. The reversal of 210001011023 is 320110100012.

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 210001011023 - 2² = 210001011019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210001010995 and 210001011013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210001013023) 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, 1105523 + ... + 1281476.

It is an arithmetic number, because the mean of its divisors is an integer number (52500871500).

Almost surely, 2^210001011023 is an apocalyptic number.

210001011023 is a deficient number, since it is larger than the sum of its proper divisors (2474977).

210001011023 is an equidigital number, since it uses as much as digits as its factorization.

210001011023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474976.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 210001011023 its reverse (320110100012), we get a palindrome (530111111035).

The spelling of 210001011023 in words is "two hundred ten billion, one million, eleven thousand, twenty-three".