1213986659771 has 2 divisors, whose sum is σ = 1213986659772. Its totient is φ = 1213986659770.

The previous prime is 1213986659761. The next prime is 1213986659791. The reversal of 1213986659771 is 1779566893121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213986659771 - 2¹⁸ = 1213986397627 is a prime.

It is a super-2 number, since 2×1213986659771² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213986659698 and 1213986659707.

It is not a weakly prime, because it can be changed into another prime (1213986659761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606993329885 + 606993329886.

It is an arithmetic number, because the mean of its divisors is an integer number (606993329886).

Almost surely, 2^{1213986659771} is an apocalyptic number.

1213986659771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213986659771 is an equidigital number, since it uses as much as digits as its factorization.

1213986659771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34292160, while the sum is 65.

The spelling of 1213986659771 in words is "one trillion, two hundred thirteen billion, nine hundred eighty-six million, six hundred fifty-nine thousand, seven hundred seventy-one".