1195621121 has 4 divisors (see below), whose sum is σ = 1247604672. Its totient is φ = 1143637572.

The previous prime is 1195621099. The next prime is 1195621123. The reversal of 1195621121 is 1211265911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1195621121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1195621123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25991741 + ... + 25991786.

It is an arithmetic number, because the mean of its divisors is an integer number (311901168).

Almost surely, 2^1195621121 is an apocalyptic number.

It is an amenable number.

1195621121 is a deficient number, since it is larger than the sum of its proper divisors (51983551).

1195621121 is an equidigital number, since it uses as much as digits as its factorization.

1195621121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51983550.

The product of its digits is 1080, while the sum is 29.

The square root of 1195621121 is about 34577.7547131100. The cubic root of 1195621121 is about 1061.3644234037.

The spelling of 1195621121 in words is "one billion, one hundred ninety-five million, six hundred twenty-one thousand, one hundred twenty-one".