1020123011023 has 4 divisors (see below), whose sum is σ = 1020831923520. Its totient is φ = 1019414098528.

The previous prime is 1020123010987. The next prime is 1020123011041. The reversal of 1020123011023 is 3201103210201.

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 1020123011023 - 2²¹ = 1020120913871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020123010988 and 1020123011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020123011723) 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, 354454090 + ... + 354456967.

It is an arithmetic number, because the mean of its divisors is an integer number (255207980880).

Almost surely, 2^{1020123011023} is an apocalyptic number.

1020123011023 is a deficient number, since it is larger than the sum of its proper divisors (708912497).

1020123011023 is an equidigital number, since it uses as much as digits as its factorization.

1020123011023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708912496.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1020123011023 its reverse (3201103210201), we get a palindrome (4221226221224).

The spelling of 1020123011023 in words is "one trillion, twenty billion, one hundred twenty-three million, eleven thousand, twenty-three".