11111022000121 has 2 divisors, whose sum is σ = 11111022000122. Its totient is φ = 11111022000120.

The previous prime is 11111022000083. The next prime is 11111022000131. The reversal of 11111022000121 is 12100022011111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11058690862521 + 52331137600 = 3325461^2 + 228760^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111022000121 - 2³¹ = 11108874516473 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111022000131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555511000060 + 5555511000061.

It is an arithmetic number, because the mean of its divisors is an integer number (5555511000061).

Almost surely, 2^{11111022000121} is an apocalyptic number.

It is an amenable number.

11111022000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111022000121 is an equidigital number, since it uses as much as digits as its factorization.

11111022000121 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 13.

Adding to 11111022000121 its reverse (12100022011111), we get a palindrome (23211044011232).

The spelling of 11111022000121 in words is "eleven trillion, one hundred eleven billion, twenty-two million, one hundred twenty-one", and thus it is an aban number.