121240610153 has 4 divisors (see below), whose sum is σ = 130566810948. Its totient is φ = 111914409360.

The previous prime is 121240610147. The next prime is 121240610167. The reversal of 121240610153 is 351016042121.

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 70093621504 + 51146988649 = 264752^2 + 226157^2 .

It is not a de Polignac number, because 121240610153 - 2²⁴ = 121223832937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121240610123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4663100378 + ... + 4663100403.

It is an arithmetic number, because the mean of its divisors is an integer number (32641702737).

Almost surely, 2^121240610153 is an apocalyptic number.

121240610153 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121240610153 is a deficient number, since it is larger than the sum of its proper divisors (9326200795).

121240610153 is an equidigital number, since it uses as much as digits as its factorization.

121240610153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9326200794.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 121240610153 its reverse (351016042121), we get a palindrome (472256652274).

The spelling of 121240610153 in words is "one hundred twenty-one billion, two hundred forty million, six hundred ten thousand, one hundred fifty-three".