1233523212131 has 4 divisors (see below), whose sum is σ = 1409740813872. Its totient is φ = 1057305610392.

The previous prime is 1233523212121. The next prime is 1233523212143. The reversal of 1233523212131 is 1312123253321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1233523212131 - 2³⁴ = 1216343342947 is a prime.

It is a super-2 number, since 2×1233523212131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1233523212094 and 1233523212103.

It is not an unprimeable number, because it can be changed into a prime (1233523212121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88108800860 + ... + 88108800873.

It is an arithmetic number, because the mean of its divisors is an integer number (352435203468).

Almost surely, 2^{1233523212131} is an apocalyptic number.

1233523212131 is a deficient number, since it is larger than the sum of its proper divisors (176217601741).

1233523212131 is an equidigital number, since it uses as much as digits as its factorization.

1233523212131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176217601740.

The product of its digits is 6480, while the sum is 29.

Adding to 1233523212131 its reverse (1312123253321), we get a palindrome (2545646465452).

The spelling of 1233523212131 in words is "one trillion, two hundred thirty-three billion, five hundred twenty-three million, two hundred twelve thousand, one hundred thirty-one".