1000123202123 has 4 divisors (see below), whose sum is σ = 1000140593880. Its totient is φ = 1000105810368.

The previous prime is 1000123202107. The next prime is 1000123202129. The reversal of 1000123202123 is 3212023210001.

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 1000123202123 - 2⁴ = 1000123202107 is a prime.

It is a super-2 number, since 2×1000123202123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000123202129) 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, 8609333 + ... + 8724726.

It is an arithmetic number, because the mean of its divisors is an integer number (250035148470).

Almost surely, 2^{1000123202123} is an apocalyptic number.

1000123202123 is a deficient number, since it is larger than the sum of its proper divisors (17391757).

1000123202123 is an equidigital number, since it uses as much as digits as its factorization.

1000123202123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17391756.

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

Adding to 1000123202123 its reverse (3212023210001), we get a palindrome (4212146412124).

The spelling of 1000123202123 in words is "one trillion, one hundred twenty-three million, two hundred two thousand, one hundred twenty-three".