1213351033231 has 4 divisors (see below), whose sum is σ = 1213353786312. Its totient is φ = 1213348280152.

The previous prime is 1213351033189. The next prime is 1213351033259. The reversal of 1213351033231 is 1323301533121.

It is a happy number.

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 1213351033231 - 2¹¹ = 1213351031183 is a prime.

It is a super-2 number, since 2×1213351033231² (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 1213351033231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213351033261) 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, 550036 + ... + 1652041.

It is an arithmetic number, because the mean of its divisors is an integer number (303338446578).

Almost surely, 2^{1213351033231} is an apocalyptic number.

1213351033231 is a deficient number, since it is larger than the sum of its proper divisors (2753081).

1213351033231 is an equidigital number, since it uses as much as digits as its factorization.

1213351033231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2753080.

The product of its (nonzero) digits is 4860, while the sum is 28.

Adding to 1213351033231 its reverse (1323301533121), we get a palindrome (2536652566352).

The spelling of 1213351033231 in words is "one trillion, two hundred thirteen billion, three hundred fifty-one million, thirty-three thousand, two hundred thirty-one".