11211102020009 has 2 divisors, whose sum is σ = 11211102020010. Its totient is φ = 11211102020008.

The previous prime is 11211102019981. The next prime is 11211102020011. The reversal of 11211102020009 is 90002020111211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11206559664400 + 4542355609 = 3347620^2 + 67397^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211102020009 - 2⁸ = 11211102019753 is a prime.

It is a super-5 number, since 5×11211102020009⁵ (a number of 66 digits) contains 55555 as substring.

Together with 11211102020011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11211102025009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605551010004 + 5605551010005.

It is an arithmetic number, because the mean of its divisors is an integer number (5605551010005).

Almost surely, 2^{11211102020009} is an apocalyptic number.

It is an amenable number.

11211102020009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211102020009 is an equidigital number, since it uses as much as digits as its factorization.

11211102020009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 11211102020009 in words is "eleven trillion, two hundred eleven billion, one hundred two million, twenty thousand, nine".