121514621 has 4 divisors (see below), whose sum is σ = 121581372. Its totient is φ = 121447872.

The previous prime is 121514593. The next prime is 121514639. The reversal of 121514621 is 126415121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126415121 = 7 ⋅18059303.

It can be written as a sum of positive squares in 2 ways, for example, as 61622500 + 59892121 = 7850^2 + 7739^2 .

It is a cyclic number.

It is not a de Polignac number, because 121514621 - 2²² = 117320317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121514651) 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 3 ways as a sum of consecutive naturals, for example, 30566 + ... + 34311.

It is an arithmetic number, because the mean of its divisors is an integer number (30395343).

Almost surely, 2^121514621 is an apocalyptic number.

It is an amenable number.

121514621 is a deficient number, since it is larger than the sum of its proper divisors (66751).

121514621 is an equidigital number, since it uses as much as digits as its factorization.

121514621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66750.

The product of its digits is 480, while the sum is 23.

The square root of 121514621 is about 11023.3670446012. The cubic root of 121514621 is about 495.3089538123.

Adding to 121514621 its reverse (126415121), we get a palindrome (247929742).

The spelling of 121514621 in words is "one hundred twenty-one million, five hundred fourteen thousand, six hundred twenty-one".