20103132121 has 8 divisors (see below), whose sum is σ = 20416280040. Its totient is φ = 19791923712.

The previous prime is 20103132109. The next prime is 20103132169. The reversal of 20103132121 is 12123130102.

It can be written as a sum of positive squares in 4 ways, for example, as 1760222025 + 18342910096 = 41955^2 + 135436^2 .

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 20103132121 - 2⁵ = 20103132089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20103132095 and 20103132104.

It is not an unprimeable number, because it can be changed into a prime (20103135121) 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, 463980 + ... + 505453.

It is an arithmetic number, because the mean of its divisors is an integer number (2552035005).

Almost surely, 2^20103132121 is an apocalyptic number.

It is an amenable number.

20103132121 is a deficient number, since it is larger than the sum of its proper divisors (313147919).

20103132121 is an equidigital number, since it uses as much as digits as its factorization.

20103132121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969755.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20103132121 its reverse (12123130102), we get a palindrome (32226262223).

The spelling of 20103132121 in words is "twenty billion, one hundred three million, one hundred thirty-two thousand, one hundred twenty-one".