11020111121987 has 8 divisors (see below), whose sum is σ = 12026689313472. Its totient is φ = 10014324581800.

The previous prime is 11020111121963. The next prime is 11020111121993. The reversal of 11020111121987 is 78912111102011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11020111121987 - 2¹² = 11020111117891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11020111121087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197883713 + ... + 197939394.

It is an arithmetic number, because the mean of its divisors is an integer number (1503336164184).

Almost surely, 2^{11020111121987} is an apocalyptic number.

11020111121987 is a deficient number, since it is larger than the sum of its proper divisors (1006578191485).

11020111121987 is a wasteful number, since it uses less digits than its factorization.

11020111121987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395825649.

The product of its (nonzero) digits is 2016, while the sum is 35.

Adding to 11020111121987 its reverse (78912111102011), we get a palindrome (89932222223998).

The spelling of 11020111121987 in words is "eleven trillion, twenty billion, one hundred eleven million, one hundred twenty-one thousand, nine hundred eighty-seven".