1020123103 has 4 divisors (see below), whose sum is σ = 1021482208. Its totient is φ = 1018764000.

The previous prime is 1020123067. The next prime is 1020123113. The reversal of 1020123103 is 3013210201.

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 1020123103 - 2⁹ = 1020122591 is a prime.

It is a super-2 number, since 2×1020123103² = 2081302290548697218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020123113) 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, 678426 + ... + 679927.

It is an arithmetic number, because the mean of its divisors is an integer number (255370552).

Almost surely, 2^1020123103 is an apocalyptic number.

1020123103 is a deficient number, since it is larger than the sum of its proper divisors (1359105).

1020123103 is an equidigital number, since it uses as much as digits as its factorization.

1020123103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359104.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1020123103 is about 31939.3660394191. The cubic root of 1020123103 is about 1006.6632040995.

Adding to 1020123103 its reverse (3013210201), we get a palindrome (4033333304).

The spelling of 1020123103 in words is "one billion, twenty million, one hundred twenty-three thousand, one hundred three".