111221100001087 has 2 divisors, whose sum is σ = 111221100001088. Its totient is φ = 111221100001086.

The previous prime is 111221100000977. The next prime is 111221100001093. The reversal of 111221100001087 is 780100001122111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111221100001087 is a prime.

It is a super-4 number, since 4×111221100001087⁴ (a number of 57 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111221100008087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610550000543 + 55610550000544.

It is an arithmetic number, because the mean of its divisors is an integer number (55610550000544).

Almost surely, 2^{111221100001087} is an apocalyptic number.

111221100001087 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221100001087 is an equidigital number, since it uses as much as digits as its factorization.

111221100001087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 25.

Adding to 111221100001087 its reverse (780100001122111), we get a palindrome (891321101123198).

The spelling of 111221100001087 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred million, one thousand, eighty-seven".