20120453121 has 8 divisors (see below), whose sum is σ = 26829284800. Its totient is φ = 13412628432.

The previous prime is 20120453099. The next prime is 20120453159. The reversal of 20120453121 is 12135402102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20120453121 - 2⁶ = 20120453057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120453021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203821 + ... + 285978.

It is an arithmetic number, because the mean of its divisors is an integer number (3353660600).

Almost surely, 2^20120453121 is an apocalyptic number.

It is an amenable number.

20120453121 is a deficient number, since it is larger than the sum of its proper divisors (6708831679).

20120453121 is a wasteful number, since it uses less digits than its factorization.

20120453121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503495.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 20120453121 its reverse (12135402102), we get a palindrome (32255855223).

The spelling of 20120453121 in words is "twenty billion, one hundred twenty million, four hundred fifty-three thousand, one hundred twenty-one".