20121032123 has 8 divisors (see below), whose sum is σ = 20723397888. Its totient is φ = 19521748224.

The previous prime is 20121032093. The next prime is 20121032147. The reversal of 20121032123 is 32123012102.

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

It is a cyclic number.

It is not a de Polignac number, because 20121032123 - 2²⁶ = 20053923259 is a prime.

It is a Duffinian number.

20121032123 is a modest number, since divided by 32123 gives 20121 as remainder.

It is not an unprimeable number, because it can be changed into a prime (20121032423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 757211 + ... + 783332.

It is an arithmetic number, because the mean of its divisors is an integer number (2590424736).

Almost surely, 2^20121032123 is an apocalyptic number.

20121032123 is a deficient number, since it is larger than the sum of its proper divisors (602365765).

20121032123 is a wasteful number, since it uses less digits than its factorization.

20121032123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540933.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20121032123 its reverse (32123012102), we get a palindrome (52244044225).

The spelling of 20121032123 in words is "twenty billion, one hundred twenty-one million, thirty-two thousand, one hundred twenty-three".