1161502221180 has 96 divisors (see below), whose sum is σ = 3719122154496. Its totient is φ = 265320861696.

The previous prime is 1161502221167. The next prime is 1161502221193. The reversal of 1161502221180 is 811222051611.

It is an interprime number because it is at equal distance from previous prime (1161502221167) and next prime (1161502221193).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185509 + ... + 1535388.

It is an arithmetic number, because the mean of its divisors is an integer number (38740855776).

Almost surely, 2^{1161502221180} is an apocalyptic number.

1161502221180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161502221180 is an abundant number, since it is smaller than the sum of its proper divisors (2557619933316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1161502221180 is a wasteful number, since it uses less digits than its factorization.

1161502221180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722523 (or 1722521 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 30.

Adding to 1161502221180 its reverse (811222051611), we get a palindrome (1972724272791).

The spelling of 1161502221180 in words is "one trillion, one hundred sixty-one billion, five hundred two million, two hundred twenty-one thousand, one hundred eighty".