1115621621171 has 4 divisors (see below), whose sum is σ = 1164126909072. Its totient is φ = 1067116333272.

The previous prime is 1115621621141. The next prime is 1115621621201. The reversal of 1115621621171 is 1711261265111.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1115621621141) and next prime (1115621621201).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1115621621171 is a prime.

It is a super-2 number, since 2×1115621621171² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115621621141) 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, 24252643916 + ... + 24252643961.

It is an arithmetic number, because the mean of its divisors is an integer number (291031727268).

Almost surely, 2^{1115621621171} is an apocalyptic number.

1115621621171 is a deficient number, since it is larger than the sum of its proper divisors (48505287901).

1115621621171 is an equidigital number, since it uses as much as digits as its factorization.

1115621621171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48505287900.

The product of its digits is 5040, while the sum is 35.

Adding to 1115621621171 its reverse (1711261265111), we get a palindrome (2826882886282).

The spelling of 1115621621171 in words is "one trillion, one hundred fifteen billion, six hundred twenty-one million, six hundred twenty-one thousand, one hundred seventy-one".