11022112921 has 2 divisors, whose sum is σ = 11022112922. Its totient is φ = 11022112920.

The previous prime is 11022112919. The next prime is 11022112939. The reversal of 11022112921 is 12921122011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10820160400 + 201952521 = 104020^2 + 14211^2 .

It is a cyclic number.

It is not a de Polignac number, because 11022112921 - 2¹ = 11022112919 is a prime.

Together with 11022112919, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 11022112892 and 11022112901.

It is not a weakly prime, because it can be changed into another prime (11022112991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5511056460 + 5511056461.

It is an arithmetic number, because the mean of its divisors is an integer number (5511056461).

Almost surely, 2^11022112921 is an apocalyptic number.

It is an amenable number.

11022112921 is a deficient number, since it is larger than the sum of its proper divisors (1).

11022112921 is an equidigital number, since it uses as much as digits as its factorization.

11022112921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 11022112921 its reverse (12921122011), we get a palindrome (23943234932).

The spelling of 11022112921 in words is "eleven billion, twenty-two million, one hundred twelve thousand, nine hundred twenty-one".