121645332243 has 48 divisors (see below), whose sum is σ = 191403759456. Its totient is φ = 74144378880.

The previous prime is 121645332217. The next prime is 121645332251. The reversal of 121645332243 is 342233546121.

121645332243 is a `hidden beast` number, since 1 + 2 + 1 + 64 + 533 + 22 + 43 = 666.

It is not a de Polignac number, because 121645332243 - 2²⁸ = 121376896787 is a prime.

It is a super-2 number, since 2×121645332243² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121645332198 and 121645332207.

It is not an unprimeable number, because it can be changed into a prime (121645332443) 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 47 ways as a sum of consecutive naturals, for example, 1419996 + ... + 1503222.

It is an arithmetic number, because the mean of its divisors is an integer number (3987578322).

Almost surely, 2^121645332243 is an apocalyptic number.

121645332243 is a deficient number, since it is larger than the sum of its proper divisors (69758427213).

121645332243 is a wasteful number, since it uses less digits than its factorization.

121645332243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83524 (or 83521 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

Adding to 121645332243 its reverse (342233546121), we get a palindrome (463878878364).

The spelling of 121645332243 in words is "one hundred twenty-one billion, six hundred forty-five million, three hundred thirty-two thousand, two hundred forty-three".