121350115531 has 2 divisors, whose sum is σ = 121350115532. Its totient is φ = 121350115530.

The previous prime is 121350115511. The next prime is 121350115559. The reversal of 121350115531 is 135511053121.

It is an a-pointer prime, because the next prime (121350115559) can be obtained adding 121350115531 to its sum of digits (28).

It is a weak prime.

It is an emirp because it is prime and its reverse (135511053121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121350115531 - 2¹³ = 121350107339 is a prime.

It is a super-2 number, since 2×121350115531² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121350115531.

It is not a weakly prime, because it can be changed into another prime (121350115511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60675057765 + 60675057766.

It is an arithmetic number, because the mean of its divisors is an integer number (60675057766).

Almost surely, 2^121350115531 is an apocalyptic number.

121350115531 is a deficient number, since it is larger than the sum of its proper divisors (1).

121350115531 is an equidigital number, since it uses as much as digits as its factorization.

121350115531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 28.

Adding to 121350115531 its reverse (135511053121), we get a palindrome (256861168652).

The spelling of 121350115531 in words is "one hundred twenty-one billion, three hundred fifty million, one hundred fifteen thousand, five hundred thirty-one".