121356346153 has 4 divisors (see below), whose sum is σ = 138692967040. Its totient is φ = 104019725268.

The previous prime is 121356346127. The next prime is 121356346207. The reversal of 121356346153 is 351643653121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 351643653121 = 22259 ⋅15797819.

It is a cyclic number.

It is not a de Polignac number, because 121356346153 - 2²¹ = 121354249001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121356346103) 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, 8668310433 + ... + 8668310446.

It is an arithmetic number, because the mean of its divisors is an integer number (34673241760).

Almost surely, 2^121356346153 is an apocalyptic number.

It is an amenable number.

121356346153 is a deficient number, since it is larger than the sum of its proper divisors (17336620887).

121356346153 is an equidigital number, since it uses as much as digits as its factorization.

121356346153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17336620886.

The product of its digits is 194400, while the sum is 40.

Adding to 121356346153 its reverse (351643653121), we get a palindrome (472999999274).

The spelling of 121356346153 in words is "one hundred twenty-one billion, three hundred fifty-six million, three hundred forty-six thousand, one hundred fifty-three".