11212021109987 has 2 divisors, whose sum is σ = 11212021109988. Its totient is φ = 11212021109986.

The previous prime is 11212021109981. The next prime is 11212021110233. The reversal of 11212021109987 is 78990112021211.

It is a weak prime.

It is an emirp because it is prime and its reverse (78990112021211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11212021109987 - 2³⁶ = 11143301633251 is a prime.

It is a super-2 number, since 2×11212021109987² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11212021109981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606010554993 + 5606010554994.

It is an arithmetic number, because the mean of its divisors is an integer number (5606010554994).

Almost surely, 2^{11212021109987} is an apocalyptic number.

11212021109987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212021109987 is an equidigital number, since it uses as much as digits as its factorization.

11212021109987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 44.

The spelling of 11212021109987 in words is "eleven trillion, two hundred twelve billion, twenty-one million, one hundred nine thousand, nine hundred eighty-seven".