1200123101023 has 16 divisors (see below), whose sum is σ = 1496286457344. Its totient is φ = 935142680160.

The previous prime is 1200123100997. The next prime is 1200123101053. The reversal of 1200123101023 is 3201013210021.

It is a cyclic number.

It is not a de Polignac number, because 1200123101023 - 2³³ = 1191533166431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200123100988 and 1200123101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200123101053) 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, 4939261 + ... + 5176537.

It is an arithmetic number, because the mean of its divisors is an integer number (93517903584).

Almost surely, 2^{1200123101023} is an apocalyptic number.

1200123101023 is a deficient number, since it is larger than the sum of its proper divisors (296163356321).

1200123101023 is a wasteful number, since it uses less digits than its factorization.

1200123101023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302982.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1200123101023 its reverse (3201013210021), we get a palindrome (4401136311044).

The spelling of 1200123101023 in words is "one trillion, two hundred billion, one hundred twenty-three million, one hundred one thousand, twenty-three".