1213202031311 has 2 divisors, whose sum is σ = 1213202031312. Its totient is φ = 1213202031310.

The previous prime is 1213202031281. The next prime is 1213202031317. The reversal of 1213202031311 is 1131302023121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213202031311 - 2⁶ = 1213202031247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213202031317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606601015655 + 606601015656.

It is an arithmetic number, because the mean of its divisors is an integer number (606601015656).

Almost surely, 2^{1213202031311} is an apocalyptic number.

1213202031311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213202031311 is an equidigital number, since it uses as much as digits as its factorization.

1213202031311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1213202031311 its reverse (1131302023121), we get a palindrome (2344504054432).

The spelling of 1213202031311 in words is "one trillion, two hundred thirteen billion, two hundred two million, thirty-one thousand, three hundred eleven".