11211011119921 has 2 divisors, whose sum is σ = 11211011119922. Its totient is φ = 11211011119920.

The previous prime is 11211011119901. The next prime is 11211011119937. The reversal of 11211011119921 is 12991111011211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9184772748321 + 2026238371600 = 3030639^2 + 1423460^2 .

It is an emirp because it is prime and its reverse (12991111011211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11211011119921 - 2¹⁵ = 11211011087153 is a prime.

It is not a weakly prime, because it can be changed into another prime (11211011119901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605505559960 + 5605505559961.

It is an arithmetic number, because the mean of its divisors is an integer number (5605505559961).

Almost surely, 2^{11211011119921} is an apocalyptic number.

It is an amenable number.

11211011119921 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211011119921 is an equidigital number, since it uses as much as digits as its factorization.

11211011119921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 31.

The spelling of 11211011119921 in words is "eleven trillion, two hundred eleven billion, eleven million, one hundred nineteen thousand, nine hundred twenty-one".