121342513445 has 4 divisors (see below), whose sum is σ = 145611016140. Its totient is φ = 97074010752.

The previous prime is 121342513433. The next prime is 121342513451. The reversal of 121342513445 is 544315243121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34227220036 + 87115293409 = 185006^2 + 295153^2 .

It is a cyclic number.

It is not a de Polignac number, because 121342513445 - 2¹⁴ = 121342497061 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12134251340 + ... + 12134251349.

It is an arithmetic number, because the mean of its divisors is an integer number (36402754035).

Almost surely, 2^121342513445 is an apocalyptic number.

It is an amenable number.

121342513445 is a deficient number, since it is larger than the sum of its proper divisors (24268502695).

121342513445 is an equidigital number, since it uses as much as digits as its factorization.

121342513445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24268502694.

The product of its digits is 57600, while the sum is 35.

Adding to 121342513445 its reverse (544315243121), we get a palindrome (665657756566).

The spelling of 121342513445 in words is "one hundred twenty-one billion, three hundred forty-two million, five hundred thirteen thousand, four hundred forty-five".