121345043537 has 2 divisors, whose sum is σ = 121345043538. Its totient is φ = 121345043536.

The previous prime is 121345043497. The next prime is 121345043593. The reversal of 121345043537 is 735340543121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121310103616 + 34939921 = 348296^2 + 5911^2 .

It is a cyclic number.

It is not a de Polignac number, because 121345043537 - 2¹⁰ = 121345042513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121345043537.

It is not a weakly prime, because it can be changed into another prime (121345042537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60672521768 + 60672521769.

It is an arithmetic number, because the mean of its divisors is an integer number (60672521769).

Almost surely, 2^121345043537 is an apocalyptic number.

It is an amenable number.

121345043537 is a deficient number, since it is larger than the sum of its proper divisors (1).

121345043537 is an equidigital number, since it uses as much as digits as its factorization.

121345043537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 38.

Adding to 121345043537 its reverse (735340543121), we get a palindrome (856685586658).

The spelling of 121345043537 in words is "one hundred twenty-one billion, three hundred forty-five million, forty-three thousand, five hundred thirty-seven".