111211022002021 has 2 divisors, whose sum is σ = 111211022002022. Its totient is φ = 111211022002020.

The previous prime is 111211022002019. The next prime is 111211022002037. The reversal of 111211022002021 is 120200220112111.

It is an a-pointer prime, because the next prime (111211022002037) can be obtained adding 111211022002021 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101012771361121 + 10198250640900 = 10050511^2 + 3193470^2 .

It is a cyclic number.

It is not a de Polignac number, because 111211022002021 - 2¹ = 111211022002019 is a prime.

Together with 111211022002019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 111211022001986 and 111211022002004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111211022002001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605511001010 + 55605511001011.

It is an arithmetic number, because the mean of its divisors is an integer number (55605511001011).

Almost surely, 2^{111211022002021} is an apocalyptic number.

It is an amenable number.

111211022002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211022002021 is an equidigital number, since it uses as much as digits as its factorization.

111211022002021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111211022002021 its reverse (120200220112111), we get a palindrome (231411242114132).

The spelling of 111211022002021 in words is "one hundred eleven trillion, two hundred eleven billion, twenty-two million, two thousand, twenty-one".