1196203751521 has 9 divisors (see below), whose sum is σ = 1236070753299. Its totient is φ = 1157583722400.

The previous prime is 1196203751447. The next prime is 1196203751539. The reversal of 1196203751521 is 1251573026911.

The square root of 1196203751521 is 1093711.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 224402111521 + 971801640000 = 473711^2 + 985800^2 .

It is not a de Polignac number, because 1196203751521 - 2⁹ = 1196203751009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1196203751581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 33887401 + ... + 33922681.

It is an arithmetic number, because the mean of its divisors is an integer number (137341194811).

Almost surely, 2^{1196203751521} is an apocalyptic number.

1196203751521 is the 1093711-st square number.

1196203751521 is the 546856-th centered octagonal number.

It is an amenable number.

1196203751521 is a deficient number, since it is larger than the sum of its proper divisors (39867001778).

1196203751521 is an frugal number, since it uses more digits than its factorization.

1196203751521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70624 (or 35312 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 43.

The spelling of 1196203751521 in words is "one trillion, one hundred ninety-six billion, two hundred three million, seven hundred fifty-one thousand, five hundred twenty-one".