1213351331767 has 32 divisors (see below), whose sum is σ = 1360984633344. Its totient is φ = 1075737062400.

The previous prime is 1213351331701. The next prime is 1213351331837. The reversal of 1213351331767 is 7671331533121.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213351331767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213351331167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25266283 + ... + 25314259.

It is an arithmetic number, because the mean of its divisors is an integer number (42530769792).

Almost surely, 2^{1213351331767} is an apocalyptic number.

1213351331767 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1213351331767 is a deficient number, since it is larger than the sum of its proper divisors (147633301577).

1213351331767 is a wasteful number, since it uses less digits than its factorization.

1213351331767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48999.

The product of its digits is 238140, while the sum is 43.

Adding to 1213351331767 its reverse (7671331533121), we get a palindrome (8884682864888).

The spelling of 1213351331767 in words is "one trillion, two hundred thirteen billion, three hundred fifty-one million, three hundred thirty-one thousand, seven hundred sixty-seven".