121322645 has 4 divisors (see below), whose sum is σ = 145587180. Its totient is φ = 97058112.

The previous prime is 121322639. The next prime is 121322681. The reversal of 121322645 is 546223121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546223121 = 59 ⋅9258019.

It can be written as a sum of positive squares in 2 ways, for example, as 81468676 + 39853969 = 9026^2 + 6313^2 .

It is a cyclic number.

It is not a de Polignac number, because 121322645 - 2⁴ = 121322629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12132260 + ... + 12132269.

It is an arithmetic number, because the mean of its divisors is an integer number (36396795).

Almost surely, 2^121322645 is an apocalyptic number.

It is an amenable number.

121322645 is a deficient number, since it is larger than the sum of its proper divisors (24264535).

121322645 is an equidigital number, since it uses as much as digits as its factorization.

121322645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24264534.

The product of its digits is 2880, while the sum is 26.

The square root of 121322645 is about 11014.6559183662. The cubic root of 121322645 is about 495.0479768483.

Adding to 121322645 its reverse (546223121), we get a palindrome (667545766).

The spelling of 121322645 in words is "one hundred twenty-one million, three hundred twenty-two thousand, six hundred forty-five".