121454532121 has 4 divisors (see below), whose sum is σ = 130797188452. Its totient is φ = 112111875792.

The previous prime is 121454532109. The next prime is 121454532149. The reversal of 121454532121 is 121235454121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121235454121 = 61 ⋅1987466461.

It can be written as a sum of positive squares in 2 ways, for example, as 43647566400 + 77806965721 = 208920^2 + 278939^2 .

It is a cyclic number.

It is not a de Polignac number, because 121454532121 - 2⁷ = 121454531993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121454530121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4671328146 + ... + 4671328171.

It is an arithmetic number, because the mean of its divisors is an integer number (32699297113).

Almost surely, 2^121454532121 is an apocalyptic number.

It is an amenable number.

121454532121 is a deficient number, since it is larger than the sum of its proper divisors (9342656331).

121454532121 is an equidigital number, since it uses as much as digits as its factorization.

121454532121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9342656330.

The product of its digits is 9600, while the sum is 31.

Adding to 121454532121 its reverse (121235454121), we get a palindrome (242689986242).

The spelling of 121454532121 in words is "one hundred twenty-one billion, four hundred fifty-four million, five hundred thirty-two thousand, one hundred twenty-one".