121232545321 has 4 divisors (see below), whose sum is σ = 121233967444. Its totient is φ = 121231123200.

The previous prime is 121232545319. The next prime is 121232545433. The reversal of 121232545321 is 123545232121.

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: 123545232121 = 23039 ⋅5362439.

It can be written as a sum of positive squares in 2 ways, for example, as 86709047296 + 34523498025 = 294464^2 + 185805^2 .

It is a cyclic number.

It is not a de Polignac number, because 121232545321 - 2¹ = 121232545319 is a prime.

It is a super-3 number, since 3×121232545321³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121232545121) 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, 574440 + ... + 756601.

It is an arithmetic number, because the mean of its divisors is an integer number (30308491861).

Almost surely, 2^121232545321 is an apocalyptic number.

It is an amenable number.

121232545321 is a deficient number, since it is larger than the sum of its proper divisors (1422123).

121232545321 is an equidigital number, since it uses as much as digits as its factorization.

121232545321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422122.

The product of its digits is 14400, while the sum is 31.

Adding to 121232545321 its reverse (123545232121), we get a palindrome (244777777442).

The spelling of 121232545321 in words is "one hundred twenty-one billion, two hundred thirty-two million, five hundred forty-five thousand, three hundred twenty-one".