20321111401 has 16 divisors (see below), whose sum is σ = 21506613760. Its totient is φ = 19147466880.

The previous prime is 20321111341. The next prime is 20321111407. The reversal of 20321111401 is 10411112302.

It is a cyclic number.

It is not a de Polignac number, because 20321111401 - 2⁹ = 20321110889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20321111407) 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, 3191461 + ... + 3197821.

It is an arithmetic number, because the mean of its divisors is an integer number (1344163360).

Almost surely, 2^20321111401 is an apocalyptic number.

It is an amenable number.

20321111401 is a deficient number, since it is larger than the sum of its proper divisors (1185502359).

20321111401 is a wasteful number, since it uses less digits than its factorization.

20321111401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7264.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20321111401 its reverse (10411112302), we get a palindrome (30732223703).

Subtracting from 20321111401 its reverse (10411112302), we obtain a palindrome (9909999099).

The spelling of 20321111401 in words is "twenty billion, three hundred twenty-one million, one hundred eleven thousand, four hundred one".