121121121111047 has 2 divisors, whose sum is σ = 121121121111048. Its totient is φ = 121121121111046.

The previous prime is 121121121110947. The next prime is 121121121111097. The reversal of 121121121111047 is 740111121121121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121121121111047 - 2⁸ = 121121121110791 is a prime.

It is a super-4 number, since 4×121121121111047⁴ (a number of 57 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121121121111097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560560555523 + 60560560555524.

It is an arithmetic number, because the mean of its divisors is an integer number (60560560555524).

Almost surely, 2^{121121121111047} is an apocalyptic number.

121121121111047 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121121111047 is an equidigital number, since it uses as much as digits as its factorization.

121121121111047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 26.

Adding to 121121121111047 its reverse (740111121121121), we get a palindrome (861232242232168).

The spelling of 121121121111047 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred eleven thousand, forty-seven".