20303231121 has 16 divisors (see below), whose sum is σ = 31848206400. Its totient is φ = 12739281984.

The previous prime is 20303231101. The next prime is 20303231141. The reversal of 20303231121 is 12113230302.

It is an interprime number because it is at equal distance from previous prime (20303231101) and next prime (20303231141).

It is not a de Polignac number, because 20303231121 - 2⁶ = 20303231057 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20303231094 and 20303231103.

It is not an unprimeable number, because it can be changed into a prime (20303231101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22116351 + ... + 22117268.

It is an arithmetic number, because the mean of its divisors is an integer number (1990512900).

Almost surely, 2^20303231121 is an apocalyptic number.

It is an amenable number.

20303231121 is a deficient number, since it is larger than the sum of its proper divisors (11544975279).

20303231121 is a wasteful number, since it uses less digits than its factorization.

20303231121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44233645 (or 44233639 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20303231121 its reverse (12113230302), we get a palindrome (32416461423).

The spelling of 20303231121 in words is "twenty billion, three hundred three million, two hundred thirty-one thousand, one hundred twenty-one".