121451265144 has 72 divisors (see below), whose sum is σ = 361551743280. Its totient is φ = 36803411040.

The previous prime is 121451265127. The next prime is 121451265149. The reversal of 121451265144 is 441562154121.

121451265144 is a `hidden beast` number, since 1 + 2 + 1 + 451 + 2 + 65 + 144 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 121451265099 and 121451265108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121451265149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6961632 + ... + 6979055.

It is an arithmetic number, because the mean of its divisors is an integer number (5021551990).

Almost surely, 2^121451265144 is an apocalyptic number.

It is an amenable number.

121451265144 is an abundant number, since it is smaller than the sum of its proper divisors (240100478136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121451265144 is a wasteful number, since it uses less digits than its factorization.

121451265144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13940721 (or 13940703 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The spelling of 121451265144 in words is "one hundred twenty-one billion, four hundred fifty-one million, two hundred sixty-five thousand, one hundred forty-four".