1321133197 has 2 divisors, whose sum is σ = 1321133198. Its totient is φ = 1321133196.

The previous prime is 1321133183. The next prime is 1321133221. The reversal of 1321133197 is 7913311231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1278348516 + 42784681 = 35754^2 + 6541^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321133197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321133147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660566598 + 660566599.

It is an arithmetic number, because the mean of its divisors is an integer number (660566599).

Almost surely, 2^1321133197 is an apocalyptic number.

It is an amenable number.

1321133197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321133197 is an equidigital number, since it uses as much as digits as its factorization.

1321133197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 31.

The square root of 1321133197 is about 36347.3960140200. The cubic root of 1321133197 is about 1097.2751280918.

The spelling of 1321133197 in words is "one billion, three hundred twenty-one million, one hundred thirty-three thousand, one hundred ninety-seven".