1181530700021 has 12 divisors (see below), whose sum is σ = 1374476987520. Its totient is φ = 1012708683000.

The previous prime is 1181530700017. The next prime is 1181530700083. The reversal of 1181530700021 is 1200070351811.

It is not a de Polignac number, because 1181530700021 - 2² = 1181530700017 is a prime.

It is a super-2 number, since 2×1181530700021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181530700221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1262396 + ... + 1989146.

It is an arithmetic number, because the mean of its divisors is an integer number (114539748960).

Almost surely, 2^{1181530700021} is an apocalyptic number.

It is an amenable number.

1181530700021 is a deficient number, since it is larger than the sum of its proper divisors (192946287499).

1181530700021 is an equidigital number, since it uses as much as digits as its factorization.

1181530700021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759944 (or 759937 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 29.

The spelling of 1181530700021 in words is "one trillion, one hundred eighty-one billion, five hundred thirty million, seven hundred thousand, twenty-one".