1311220200123 has 6 divisors (see below), whose sum is σ = 1893984733524. Its totient is φ = 874146800076.

The previous prime is 1311220200097. The next prime is 1311220200149. The reversal of 1311220200123 is 3210020221131.

It is an interprime number because it is at equal distance from previous prime (1311220200097) and next prime (1311220200149).

It is not a de Polignac number, because 1311220200123 - 2¹⁴ = 1311220183739 is a prime.

It is a super-3 number, since 3×1311220200123³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1311220200096 and 1311220200105.

It is not an unprimeable number, because it can be changed into a prime (1311220200023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72845566665 + ... + 72845566682.

It is an arithmetic number, because the mean of its divisors is an integer number (315664122254).

Almost surely, 2^{1311220200123} is an apocalyptic number.

1311220200123 is a deficient number, since it is larger than the sum of its proper divisors (582764533401).

1311220200123 is a wasteful number, since it uses less digits than its factorization.

1311220200123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145691133353 (or 145691133350 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1311220200123 its reverse (3210020221131), we get a palindrome (4521240421254).

The spelling of 1311220200123 in words is "one trillion, three hundred eleven billion, two hundred twenty million, two hundred thousand, one hundred twenty-three".