11211322021 has 2 divisors, whose sum is σ = 11211322022. Its totient is φ = 11211322020.

The previous prime is 11211321991. The next prime is 11211322069. The reversal of 11211322021 is 12022311211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10896436996 + 314885025 = 104386^2 + 17745^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211322021 - 2³³ = 2621387429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11211321986 and 11211322004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11211322321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605661010 + 5605661011.

It is an arithmetic number, because the mean of its divisors is an integer number (5605661011).

Almost surely, 2^11211322021 is an apocalyptic number.

It is an amenable number.

11211322021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211322021 is an equidigital number, since it uses as much as digits as its factorization.

11211322021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11211322021 its reverse (12022311211), we get a palindrome (23233633232).

The spelling of 11211322021 in words is "eleven billion, two hundred eleven million, three hundred twenty-two thousand, twenty-one".