121435513 has 2 divisors, whose sum is σ = 121435514. Its totient is φ = 121435512.

The previous prime is 121435493. The next prime is 121435519. The reversal of 121435513 is 315534121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120297024 + 1138489 = 10968^2 + 1067^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121435513 is a prime.

It is not a weakly prime, because it can be changed into another prime (121435519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60717756 + 60717757.

It is an arithmetic number, because the mean of its divisors is an integer number (60717757).

Almost surely, 2^121435513 is an apocalyptic number.

It is an amenable number.

121435513 is a deficient number, since it is larger than the sum of its proper divisors (1).

121435513 is an equidigital number, since it uses as much as digits as its factorization.

121435513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 25.

The square root of 121435513 is about 11019.7782645569. The cubic root of 121435513 is about 495.2014457436.

Adding to 121435513 its reverse (315534121), we get a palindrome (436969634).

The spelling of 121435513 in words is "one hundred twenty-one million, four hundred thirty-five thousand, five hundred thirteen".