11121001987 has 2 divisors, whose sum is σ = 11121001988. Its totient is φ = 11121001986.

The previous prime is 11121001951. The next prime is 11121002017. The reversal of 11121001987 is 78910012111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11121001987 - 2¹⁵ = 11120969219 is a prime.

It is not a weakly prime, because it can be changed into another prime (11121001487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560500993 + 5560500994.

It is an arithmetic number, because the mean of its divisors is an integer number (5560500994).

Almost surely, 2^11121001987 is an apocalyptic number.

11121001987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121001987 is an equidigital number, since it uses as much as digits as its factorization.

11121001987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 31.

The spelling of 11121001987 in words is "eleven billion, one hundred twenty-one million, one thousand, nine hundred eighty-seven".