1185880842121 has 4 divisors (see below), whose sum is σ = 1188296078544. Its totient is φ = 1183465605700.

The previous prime is 1185880842109. The next prime is 1185880842163. The reversal of 1185880842121 is 1212480885811.

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 not a de Polignac number, because 1185880842121 - 2⁵ = 1185880842089 is a prime.

It is a super-2 number, since 2×1185880842121² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1185880842101) 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, 1207617475 + ... + 1207618456.

It is an arithmetic number, because the mean of its divisors is an integer number (297074019636).

Almost surely, 2^{1185880842121} is an apocalyptic number.

It is an amenable number.

1185880842121 is a deficient number, since it is larger than the sum of its proper divisors (2415236423).

1185880842121 is an equidigital number, since it uses as much as digits as its factorization.

1185880842121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415236422.

The product of its (nonzero) digits is 327680, while the sum is 49.

The spelling of 1185880842121 in words is "one trillion, one hundred eighty-five billion, eight hundred eighty million, eight hundred forty-two thousand, one hundred twenty-one".