20321121003 has 8 divisors (see below), whose sum is σ = 28688641488. Its totient is φ = 12750507264.

The previous prime is 20321121001. The next prime is 20321121013. The reversal of 20321121003 is 30012112302.

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

It is not a de Polignac number, because 20321121003 - 2¹ = 20321121001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20321121001) 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, 199226626 + ... + 199226727.

It is an arithmetic number, because the mean of its divisors is an integer number (3586080186).

Almost surely, 2^20321121003 is an apocalyptic number.

20321121003 is a deficient number, since it is larger than the sum of its proper divisors (8367520485).

20321121003 is a wasteful number, since it uses less digits than its factorization.

20321121003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398453373.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20321121003 its reverse (30012112302), we get a palindrome (50333233305).

The spelling of 20321121003 in words is "twenty billion, three hundred twenty-one million, one hundred twenty-one thousand, three".