1020002312123 has 16 divisors (see below), whose sum is σ = 1085099829120. Its totient is φ = 956069096256.

The previous prime is 1020002312113. The next prime is 1020002312201. The reversal of 1020002312123 is 3212132000201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020002312123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020002312113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1281215 + ... + 1918727.

It is an arithmetic number, because the mean of its divisors is an integer number (67818739320).

Almost surely, 2^{1020002312123} is an apocalyptic number.

1020002312123 is a deficient number, since it is larger than the sum of its proper divisors (65097516997).

1020002312123 is a wasteful number, since it uses less digits than its factorization.

1020002312123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638426.

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

Adding to 1020002312123 its reverse (3212132000201), we get a palindrome (4232134312324).

The spelling of 1020002312123 in words is "one trillion, twenty billion, two million, three hundred twelve thousand, one hundred twenty-three".