11212087412921 has 2 divisors, whose sum is σ = 11212087412922. Its totient is φ = 11212087412920.

The previous prime is 11212087412899. The next prime is 11212087412927. The reversal of 11212087412921 is 12921478021211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11181406387321 + 30681025600 = 3343861^2 + 175160^2 .

It is an emirp because it is prime and its reverse (12921478021211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11212087412921 - 2⁶ = 11212087412857 is a prime.

It is not a weakly prime, because it can be changed into another prime (11212087412927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606043706460 + 5606043706461.

It is an arithmetic number, because the mean of its divisors is an integer number (5606043706461).

Almost surely, 2^{11212087412921} is an apocalyptic number.

It is an amenable number.

11212087412921 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212087412921 is an equidigital number, since it uses as much as digits as its factorization.

11212087412921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 41.

The spelling of 11212087412921 in words is "eleven trillion, two hundred twelve billion, eighty-seven million, four hundred twelve thousand, nine hundred twenty-one".