121224053245 has 4 divisors (see below), whose sum is σ = 145468863900. Its totient is φ = 96979242592.

The previous prime is 121224053227. The next prime is 121224053267. The reversal of 121224053245 is 542350422121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32649960249 + 88574092996 = 180693^2 + 297614^2 .

It is a cyclic number.

It is not a de Polignac number, because 121224053245 - 2⁷ = 121224053117 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, 12122405320 + ... + 12122405329.

It is an arithmetic number, because the mean of its divisors is an integer number (36367215975).

Almost surely, 2^121224053245 is an apocalyptic number.

It is an amenable number.

121224053245 is a deficient number, since it is larger than the sum of its proper divisors (24244810655).

121224053245 is an equidigital number, since it uses as much as digits as its factorization.

121224053245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24244810654.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 121224053245 its reverse (542350422121), we get a palindrome (663574475366).

The spelling of 121224053245 in words is "one hundred twenty-one billion, two hundred twenty-four million, fifty-three thousand, two hundred forty-five".