20211002401 has 2 divisors, whose sum is σ = 20211002402. Its totient is φ = 20211002400.

The previous prime is 20211002363. The next prime is 20211002407. The reversal of 20211002401 is 10420011202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15152379025 + 5058623376 = 123095^2 + 71124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20211002401 is a prime.

It is not a weakly prime, because it can be changed into another prime (20211002407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105501200 + 10105501201.

It is an arithmetic number, because the mean of its divisors is an integer number (10105501201).

Almost surely, 2^20211002401 is an apocalyptic number.

It is an amenable number.

20211002401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211002401 is an equidigital number, since it uses as much as digits as its factorization.

20211002401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20211002401 its reverse (10420011202), we get a palindrome (30631013603).

The spelling of 20211002401 in words is "twenty billion, two hundred eleven million, two thousand, four hundred one".