1101111221051 has 2 divisors, whose sum is σ = 1101111221052. Its totient is φ = 1101111221050.

The previous prime is 1101111220969. The next prime is 1101111221053. The reversal of 1101111221051 is 1501221111011.

It is a strong prime.

It is an emirp because it is prime and its reverse (1501221111011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1101111221051 - 2²⁶ = 1101044112187 is a prime.

It is a super-2 number, since 2×1101111221051² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 1101111221053, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1101111221053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550555610525 + 550555610526.

It is an arithmetic number, because the mean of its divisors is an integer number (550555610526).

Almost surely, 2^{1101111221051} is an apocalyptic number.

1101111221051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101111221051 is an equidigital number, since it uses as much as digits as its factorization.

1101111221051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20, while the sum is 17.

Adding to 1101111221051 its reverse (1501221111011), we get a palindrome (2602332332062).

The spelling of 1101111221051 in words is "one trillion, one hundred one billion, one hundred eleven million, two hundred twenty-one thousand, fifty-one".