11022012121 has 2 divisors, whose sum is σ = 11022012122. Its totient is φ = 11022012120.

The previous prime is 11022012073. The next prime is 11022012161. The reversal of 11022012121 is 12121022011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6854018521 + 4167993600 = 82789^2 + 64560^2 .

It is a cyclic number.

It is not a de Polignac number, because 11022012121 - 2¹¹ = 11022010073 is a prime.

It is not a weakly prime, because it can be changed into another prime (11022012161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5511006060 + 5511006061.

It is an arithmetic number, because the mean of its divisors is an integer number (5511006061).

Almost surely, 2^11022012121 is an apocalyptic number.

It is an amenable number.

11022012121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11022012121 is an equidigital number, since it uses as much as digits as its factorization.

11022012121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11022012121 its reverse (12121022011), we get a palindrome (23143034132).

The spelling of 11022012121 in words is "eleven billion, twenty-two million, twelve thousand, one hundred twenty-one".