11122001021 has 2 divisors, whose sum is σ = 11122001022. Its totient is φ = 11122001020.

The previous prime is 11122000999. The next prime is 11122001027. The reversal of 11122001021 is 12010022111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9464371225 + 1657629796 = 97285^2 + 40714^2 .

It is a cyclic number.

It is not a de Polignac number, because 11122001021 - 2¹⁰ = 11121999997 is a prime.

It is a super-2 number, since 2×11122001021² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11122000993 and 11122001011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11122001027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561000510 + 5561000511.

It is an arithmetic number, because the mean of its divisors is an integer number (5561000511).

Almost surely, 2^11122001021 is an apocalyptic number.

It is an amenable number.

11122001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11122001021 is an equidigital number, since it uses as much as digits as its factorization.

11122001021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11122001021 its reverse (12010022111), we get a palindrome (23132023132).

The spelling of 11122001021 in words is "eleven billion, one hundred twenty-two million, one thousand, twenty-one".