1131211201969 has 2 divisors, whose sum is σ = 1131211201970. Its totient is φ = 1131211201968.

The previous prime is 1131211201949. The next prime is 1131211202003. The reversal of 1131211201969 is 9691021121311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 652319521569 + 478891680400 = 807663^2 + 692020^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131211201969 - 2⁹ = 1131211201457 is a prime.

It is a super-2 number, since 2×1131211201969² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1131211201949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565605600984 + 565605600985.

It is an arithmetic number, because the mean of its divisors is an integer number (565605600985).

Almost surely, 2^{1131211201969} is an apocalyptic number.

It is an amenable number.

1131211201969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131211201969 is an equidigital number, since it uses as much as digits as its factorization.

1131211201969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 37.

The spelling of 1131211201969 in words is "one trillion, one hundred thirty-one billion, two hundred eleven million, two hundred one thousand, nine hundred sixty-nine".