11211012020987 has 2 divisors, whose sum is σ = 11211012020988. Its totient is φ = 11211012020986.

The previous prime is 11211012020969. The next prime is 11211012021023. The reversal of 11211012020987 is 78902021011211.

11211012020987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (78902021011211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11211012020987 is a prime.

It is not a weakly prime, because it can be changed into another prime (11211012020947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605506010493 + 5605506010494.

It is an arithmetic number, because the mean of its divisors is an integer number (5605506010494).

Almost surely, 2^{11211012020987} is an apocalyptic number.

11211012020987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211012020987 is an equidigital number, since it uses as much as digits as its factorization.

11211012020987 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 35.

The spelling of 11211012020987 in words is "eleven trillion, two hundred eleven billion, twelve million, twenty thousand, nine hundred eighty-seven".