1111122132121 has 2 divisors, whose sum is σ = 1111122132122. Its totient is φ = 1111122132120.

The previous prime is 1111122132103. The next prime is 1111122132139. The reversal of 1111122132121 is 1212312211111.

It is a balanced prime because it is at equal distance from previous prime (1111122132103) and next prime (1111122132139).

It can be written as a sum of positive squares in only one way, i.e., 864594986896 + 246527145225 = 929836^2 + 496515^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111122132121 - 2¹¹ = 1111122130073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111122132221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555561066060 + 555561066061.

It is an arithmetic number, because the mean of its divisors is an integer number (555561066061).

Almost surely, 2^{1111122132121} is an apocalyptic number.

It is an amenable number.

1111122132121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111122132121 is an equidigital number, since it uses as much as digits as its factorization.

1111122132121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48, while the sum is 19.

Adding to 1111122132121 its reverse (1212312211111), we get a palindrome (2323434343232).

The spelling of 1111122132121 in words is "one trillion, one hundred eleven billion, one hundred twenty-two million, one hundred thirty-two thousand, one hundred twenty-one".