121111053571 has 2 divisors, whose sum is σ = 121111053572. Its totient is φ = 121111053570.

The previous prime is 121111053509. The next prime is 121111053589. The reversal of 121111053571 is 175350111121.

It is a strong prime.

It is an emirp because it is prime and its reverse (175350111121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121111053571 - 2¹⁵ = 121111020803 is a prime.

It is not a weakly prime, because it can be changed into another prime (121111053071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60555526785 + 60555526786.

It is an arithmetic number, because the mean of its divisors is an integer number (60555526786).

Almost surely, 2^121111053571 is an apocalyptic number.

121111053571 is a deficient number, since it is larger than the sum of its proper divisors (1).

121111053571 is an equidigital number, since it uses as much as digits as its factorization.

121111053571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1050, while the sum is 28.

Adding to 121111053571 its reverse (175350111121), we get a palindrome (296461164692).

The spelling of 121111053571 in words is "one hundred twenty-one billion, one hundred eleven million, fifty-three thousand, five hundred seventy-one".