121442400024 has 32 divisors (see below), whose sum is σ = 331206546240. Its totient is φ = 36800727200.

The previous prime is 121442400019. The next prime is 121442400029. The reversal of 121442400024 is 420004244121.

It is an interprime number because it is at equal distance from previous prime (121442400019) and next prime (121442400029).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 121442399967 and 121442400003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121442400029) 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 7 ways as a sum of consecutive naturals, for example, 230004282 + ... + 230004809.

It is an arithmetic number, because the mean of its divisors is an integer number (10350204570).

Almost surely, 2^121442400024 is an apocalyptic number.

It is an amenable number.

121442400024 is an abundant number, since it is smaller than the sum of its proper divisors (209764146216).

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

121442400024 is a wasteful number, since it uses less digits than its factorization.

121442400024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460009111 (or 460009107 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 121442400024 its reverse (420004244121), we get a palindrome (541446644145).

The spelling of 121442400024 in words is "one hundred twenty-one billion, four hundred forty-two million, four hundred thousand, twenty-four".