1230201305523 has 12 divisors (see below), whose sum is σ = 1778833860648. Its totient is φ = 819268164000.

The previous prime is 1230201305513. The next prime is 1230201305569. The reversal of 1230201305523 is 3255031020321.

It is a happy number.

1230201305523 is a `hidden beast` number, since 1 + 2 + 3 + 0 + 2 + 0 + 130 + 5 + 523 = 666.

It is not a de Polignac number, because 1230201305523 - 2¹⁴ = 1230201289139 is a prime.

It is a super-2 number, since 2×1230201305523² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1230201305513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72160978 + ... + 72178023.

It is an arithmetic number, because the mean of its divisors is an integer number (148236155054).

Almost surely, 2^{1230201305523} is an apocalyptic number.

1230201305523 is a deficient number, since it is larger than the sum of its proper divisors (548632555125).

1230201305523 is a wasteful number, since it uses less digits than its factorization.

1230201305523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144339954 (or 144339951 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 1230201305523 its reverse (3255031020321), we get a palindrome (4485232325844).

The spelling of 1230201305523 in words is "one trillion, two hundred thirty billion, two hundred one million, three hundred five thousand, five hundred twenty-three".