121281440071 has 8 divisors (see below), whose sum is σ = 133400473488. Its totient is φ = 110255853400.

The previous prime is 121281440057. The next prime is 121281440081. The reversal of 121281440071 is 170044182121.

It is not a de Polignac number, because 121281440071 - 2⁵ = 121281440039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121281440011) 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 in 7 ways as a sum of consecutive naturals, for example, 45558940 + ... + 45561601.

It is an arithmetic number, because the mean of its divisors is an integer number (16675059186).

Almost surely, 2^121281440071 is an apocalyptic number.

121281440071 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121281440071 is a deficient number, since it is larger than the sum of its proper divisors (12119033417).

121281440071 is an frugal number, since it uses more digits than its factorization.

121281440071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91120574 (or 91120552 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The spelling of 121281440071 in words is "one hundred twenty-one billion, two hundred eighty-one million, four hundred forty thousand, seventy-one".