121340353501 has 4 divisors (see below), whose sum is σ = 128478021372. Its totient is φ = 114202685632.

The previous prime is 121340353483. The next prime is 121340353517. The reversal of 121340353501 is 105353043121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105353043121 = 2273 ⋅46349777.

It can be written as a sum of positive squares in 2 ways, for example, as 86686669476 + 34653684025 = 294426^2 + 186155^2 .

It is a cyclic number.

It is not a de Polignac number, because 121340353501 - 2⁵ = 121340353469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121340353501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121340353591) 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, 3568833910 + ... + 3568833943.

It is an arithmetic number, because the mean of its divisors is an integer number (32119505343).

Almost surely, 2^121340353501 is an apocalyptic number.

It is an amenable number.

121340353501 is a deficient number, since it is larger than the sum of its proper divisors (7137667871).

121340353501 is an equidigital number, since it uses as much as digits as its factorization.

121340353501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7137667870.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 121340353501 its reverse (105353043121), we get a palindrome (226693396622).

The spelling of 121340353501 in words is "one hundred twenty-one billion, three hundred forty million, three hundred fifty-three thousand, five hundred one".