1221175171603 has 8 divisors (see below), whose sum is σ = 1251576557280. Its totient is φ = 1190803149120.

The previous prime is 1221175171561. The next prime is 1221175171609. The reversal of 1221175171603 is 3061715711221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221175171603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221175171609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7256575 + ... + 7422952.

It is an arithmetic number, because the mean of its divisors is an integer number (156447069660).

Almost surely, 2^{1221175171603} is an apocalyptic number.

1221175171603 is a deficient number, since it is larger than the sum of its proper divisors (30401385677).

1221175171603 is a wasteful number, since it uses less digits than its factorization.

1221175171603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14681597.

The product of its (nonzero) digits is 17640, while the sum is 37.

The spelling of 1221175171603 in words is "one trillion, two hundred twenty-one billion, one hundred seventy-five million, one hundred seventy-one thousand, six hundred three".