111220100020987 has 2 divisors, whose sum is σ = 111220100020988. Its totient is φ = 111220100020986.

The previous prime is 111220100020969. The next prime is 111220100021003. The reversal of 111220100020987 is 789020001022111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111220100020987 - 2¹⁵ = 111220099988219 is a prime.

It is not a weakly prime, because it can be changed into another prime (111220100027987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610050010493 + 55610050010494.

It is an arithmetic number, because the mean of its divisors is an integer number (55610050010494).

Almost surely, 2^{111220100020987} is an apocalyptic number.

111220100020987 is a deficient number, since it is larger than the sum of its proper divisors (1).

111220100020987 is an equidigital number, since it uses as much as digits as its factorization.

111220100020987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 34.

The spelling of 111220100020987 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred million, twenty thousand, nine hundred eighty-seven".