1122121021111 has 2 divisors, whose sum is σ = 1122121021112. Its totient is φ = 1122121021110.

The previous prime is 1122121021081. The next prime is 1122121021157. The reversal of 1122121021111 is 1111201212211.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1122121021111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1122121021711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561060510555 + 561060510556.

It is an arithmetic number, because the mean of its divisors is an integer number (561060510556).

Almost surely, 2^{1122121021111} is an apocalyptic number.

1122121021111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122121021111 is an equidigital number, since it uses as much as digits as its factorization.

1122121021111 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 16.

Adding to 1122121021111 its reverse (1111201212211), we get a palindrome (2233322233322).

The spelling of 1122121021111 in words is "one trillion, one hundred twenty-two billion, one hundred twenty-one million, twenty-one thousand, one hundred eleven".