121455456971 has 2 divisors, whose sum is σ = 121455456972. Its totient is φ = 121455456970.

The previous prime is 121455456917. The next prime is 121455457001. The reversal of 121455456971 is 179654554121.

It is a happy number.

Together with previous prime (121455456917) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121455456971 - 2⁶ = 121455456907 is a prime.

It is not a weakly prime, because it can be changed into another prime (121455456901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60727728485 + 60727728486.

It is an arithmetic number, because the mean of its divisors is an integer number (60727728486).

Almost surely, 2^121455456971 is an apocalyptic number.

121455456971 is a deficient number, since it is larger than the sum of its proper divisors (1).

121455456971 is an equidigital number, since it uses as much as digits as its factorization.

121455456971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512000, while the sum is 50.

The spelling of 121455456971 in words is "one hundred twenty-one billion, four hundred fifty-five million, four hundred fifty-six thousand, nine hundred seventy-one".