1201012231123 has 16 divisors (see below), whose sum is σ = 1222555662720. Its totient is φ = 1179640312704.

The previous prime is 1201012231099. The next prime is 1201012231141. The reversal of 1201012231123 is 3211322101021.

It is not a de Polignac number, because 1201012231123 - 2¹³ = 1201012222931 is a prime.

It is a super-2 number, since 2×1201012231123² (a number of 25 digits) contains 22 as substring.

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 1201012231123.

It is not an unprimeable number, because it can be changed into a prime (1201012231183) 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, 100471915 + ... + 100483867.

It is an arithmetic number, because the mean of its divisors is an integer number (76409728920).

Almost surely, 2^{1201012231123} is an apocalyptic number.

1201012231123 is a deficient number, since it is larger than the sum of its proper divisors (21543431597).

1201012231123 is a wasteful number, since it uses less digits than its factorization.

1201012231123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18978.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1201012231123 its reverse (3211322101021), we get a palindrome (4412334332144).

The spelling of 1201012231123 in words is "one trillion, two hundred one billion, twelve million, two hundred thirty-one thousand, one hundred twenty-three".