1213311033131 has 16 divisors (see below), whose sum is σ = 1286479386720. Its totient is φ = 1140343488000.

The previous prime is 1213311033127. The next prime is 1213311033139. The reversal of 1213311033131 is 1313301133121.

It is a cyclic number.

It is not a de Polignac number, because 1213311033131 - 2² = 1213311033127 is a prime.

It is a super-2 number, since 2×1213311033131² (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 = 1213311033097 and 1213311033106.

It is not an unprimeable number, because it can be changed into a prime (1213311033139) 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, 37604756 + ... + 37637006.

It is an arithmetic number, because the mean of its divisors is an integer number (80404961670).

Almost surely, 2^{1213311033131} is an apocalyptic number.

1213311033131 is a deficient number, since it is larger than the sum of its proper divisors (73168353589).

1213311033131 is a wasteful number, since it uses less digits than its factorization.

1213311033131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35294.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 1213311033131 its reverse (1313301133121), we get a palindrome (2526612166252).

The spelling of 1213311033131 in words is "one trillion, two hundred thirteen billion, three hundred eleven million, thirty-three thousand, one hundred thirty-one".