121512493 has 2 divisors, whose sum is σ = 121512494. Its totient is φ = 121512492.

The previous prime is 121512491. The next prime is 121512497. The reversal of 121512493 is 394215121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116575209 + 4937284 = 10797^2 + 2222^2 .

It is a cyclic number.

It is not a de Polignac number, because 121512493 - 2¹ = 121512491 is a prime.

Together with 121512491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121512491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60756246 + 60756247.

It is an arithmetic number, because the mean of its divisors is an integer number (60756247).

Almost surely, 2^121512493 is an apocalyptic number.

It is an amenable number.

121512493 is a deficient number, since it is larger than the sum of its proper divisors (1).

121512493 is an equidigital number, since it uses as much as digits as its factorization.

121512493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 121512493 is about 11023.2705219458. The cubic root of 121512493 is about 495.3060624631.

The spelling of 121512493 in words is "one hundred twenty-one million, five hundred twelve thousand, four hundred ninety-three".