1213631403077 has 2 divisors, whose sum is σ = 1213631403078. Its totient is φ = 1213631403076.

The previous prime is 1213631403059. The next prime is 1213631403119. The reversal of 1213631403077 is 7703041363121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1091970660676 + 121660742401 = 1044974^2 + 348799^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213631403077 - 2²⁶ = 1213564294213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213631403077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213631603077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606815701538 + 606815701539.

It is an arithmetic number, because the mean of its divisors is an integer number (606815701539).

Almost surely, 2^{1213631403077} is an apocalyptic number.

It is an amenable number.

1213631403077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213631403077 is an equidigital number, since it uses as much as digits as its factorization.

1213631403077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 38.

Adding to 1213631403077 its reverse (7703041363121), we get a palindrome (8916672766198).

The spelling of 1213631403077 in words is "one trillion, two hundred thirteen billion, six hundred thirty-one million, four hundred three thousand, seventy-seven".