1020001123 has 4 divisors (see below), whose sum is σ = 1034367408. Its totient is φ = 1005634840.

The previous prime is 1020001063. The next prime is 1020001133. The reversal of 1020001123 is 3211000201.

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 1020001123 - 2¹³ = 1019992931 is a prime.

It is a super-2 number, since 2×1020001123² = 2080804581842522258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020001133) 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, 7183036 + ... + 7183177.

It is an arithmetic number, because the mean of its divisors is an integer number (258591852).

Almost surely, 2^1020001123 is an apocalyptic number.

1020001123 is a deficient number, since it is larger than the sum of its proper divisors (14366285).

1020001123 is an equidigital number, since it uses as much as digits as its factorization.

1020001123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14366284.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1020001123 is about 31937.4564265848. The cubic root of 1020001123 is about 1006.6230789839.

Adding to 1020001123 its reverse (3211000201), we get a palindrome (4231001324).

The spelling of 1020001123 in words is "one billion, twenty million, one thousand, one hundred twenty-three".