1020020123123 has 4 divisors (see below), whose sum is σ = 1024854341928. Its totient is φ = 1015185904320.

The previous prime is 1020020123081. The next prime is 1020020123137. The reversal of 1020020123123 is 3213210200201.

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 1020020123123 - 2¹⁶ = 1020020057587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020020123623) 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, 2417109086 + ... + 2417109507.

It is an arithmetic number, because the mean of its divisors is an integer number (256213585482).

Almost surely, 2^{1020020123123} is an apocalyptic number.

1020020123123 is a deficient number, since it is larger than the sum of its proper divisors (4834218805).

1020020123123 is an equidigital number, since it uses as much as digits as its factorization.

1020020123123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4834218804.

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

Adding to 1020020123123 its reverse (3213210200201), we get a palindrome (4233230323324).

The spelling of 1020020123123 in words is "one trillion, twenty billion, twenty million, one hundred twenty-three thousand, one hundred twenty-three".