111221222087 has 2 divisors, whose sum is σ = 111221222088. Its totient is φ = 111221222086.

The previous prime is 111221222083. The next prime is 111221222143. The reversal of 111221222087 is 780222122111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111221222087 - 2² = 111221222083 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111221222083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610611043 + 55610611044.

It is an arithmetic number, because the mean of its divisors is an integer number (55610611044).

Almost surely, 2^111221222087 is an apocalyptic number.

111221222087 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221222087 is an equidigital number, since it uses as much as digits as its factorization.

111221222087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 29.

Adding to 111221222087 its reverse (780222122111), we get a palindrome (891443344198).

The spelling of 111221222087 in words is "one hundred eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, eighty-seven".