1002111023 has 4 divisors (see below), whose sum is σ = 1009425840. Its totient is φ = 994796208.

The previous prime is 1002111013. The next prime is 1002111029. The reversal of 1002111023 is 3201112001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3201112001 = 19 ⋅168479579.

It is a cyclic number.

It is not a de Polignac number, because 1002111023 - 2⁶ = 1002110959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002110995 and 1002111013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002111029) 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, 3657203 + ... + 3657476.

It is an arithmetic number, because the mean of its divisors is an integer number (252356460).

Almost surely, 2^1002111023 is an apocalyptic number.

1002111023 is a deficient number, since it is larger than the sum of its proper divisors (7314817).

1002111023 is an equidigital number, since it uses as much as digits as its factorization.

1002111023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7314816.

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

The square root of 1002111023 is about 31656.1372090784. The cubic root of 1002111023 is about 1000.7031797557.

Adding to 1002111023 its reverse (3201112001), we get a palindrome (4203223024).

The spelling of 1002111023 in words is "one billion, two million, one hundred eleven thousand, twenty-three".