1121991029329 has 2 divisors, whose sum is σ = 1121991029330. Its totient is φ = 1121991029328.

The previous prime is 1121991029323. The next prime is 1121991029359. The reversal of 1121991029329 is 9239201991211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 902547500625 + 219443528704 = 950025^2 + 468448^2 .

It is an emirp because it is prime and its reverse (9239201991211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121991029329 - 2⁵ = 1121991029297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121991029323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560995514664 + 560995514665.

It is an arithmetic number, because the mean of its divisors is an integer number (560995514665).

Almost surely, 2^{1121991029329} is an apocalyptic number.

It is an amenable number.

1121991029329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121991029329 is an equidigital number, since it uses as much as digits as its factorization.

1121991029329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 49.

The spelling of 1121991029329 in words is "one trillion, one hundred twenty-one billion, nine hundred ninety-one million, twenty-nine thousand, three hundred twenty-nine".