121031331131111 has 2 divisors, whose sum is σ = 121031331131112. Its totient is φ = 121031331131110.

The previous prime is 121031331131093. The next prime is 121031331131119. The reversal of 121031331131111 is 111131133130121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121031331131111 - 2²⁶ = 121031264022247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121031331131119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60515665565555 + 60515665565556.

It is an arithmetic number, because the mean of its divisors is an integer number (60515665565556).

Almost surely, 2^{121031331131111} is an apocalyptic number.

121031331131111 is a deficient number, since it is larger than the sum of its proper divisors (1).

121031331131111 is an equidigital number, since it uses as much as digits as its factorization.

121031331131111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 23.

Adding to 121031331131111 its reverse (111131133130121), we get a palindrome (232162464261232).

The spelling of 121031331131111 in words is "one hundred twenty-one trillion, thirty-one billion, three hundred thirty-one million, one hundred thirty-one thousand, one hundred eleven".