1020312013123 has 8 divisors (see below), whose sum is σ = 1099435300208. Its totient is φ = 941279832864.

The previous prime is 1020312013081. The next prime is 1020312013129. The reversal of 1020312013123 is 3213102130201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020312013123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020312013123.

It is not an unprimeable number, because it can be changed into a prime (1020312013129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22753440 + ... + 22798237.

It is an arithmetic number, because the mean of its divisors is an integer number (137429412526).

Almost surely, 2^{1020312013123} is an apocalyptic number.

1020312013123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1020312013123 is a deficient number, since it is larger than the sum of its proper divisors (79123287085).

1020312013123 is a wasteful number, since it uses less digits than its factorization.

1020312013123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45553413.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1020312013123 its reverse (3213102130201), we get a palindrome (4233414143324).

The spelling of 1020312013123 in words is "one trillion, twenty billion, three hundred twelve million, thirteen thousand, one hundred twenty-three".