220011331987 has 2 divisors, whose sum is σ = 220011331988. Its totient is φ = 220011331986.

The previous prime is 220011331963. The next prime is 220011332059. The reversal of 220011331987 is 789133110022.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220011331987 is a prime.

It is not a weakly prime, because it can be changed into another prime (220011331957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110005665993 + 110005665994.

It is an arithmetic number, because the mean of its divisors is an integer number (110005665994).

Almost surely, 2^220011331987 is an apocalyptic number.

220011331987 is a deficient number, since it is larger than the sum of its proper divisors (1).

220011331987 is an equidigital number, since it uses as much as digits as its factorization.

220011331987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 220011331987 in words is "two hundred twenty billion, eleven million, three hundred thirty-one thousand, nine hundred eighty-seven".