20212002401 has 2 divisors, whose sum is σ = 20212002402. Its totient is φ = 20212002400.

The previous prime is 20212002397. The next prime is 20212002407. The reversal of 20212002401 is 10420021202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20100150625 + 111851776 = 141775^2 + 10576^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212002401 - 2² = 20212002397 is a prime.

It is not a weakly prime, because it can be changed into another prime (20212002407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106001200 + 10106001201.

It is an arithmetic number, because the mean of its divisors is an integer number (10106001201).

Almost surely, 2^20212002401 is an apocalyptic number.

It is an amenable number.

20212002401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212002401 is an equidigital number, since it uses as much as digits as its factorization.

20212002401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20212002401 its reverse (10420021202), we get a palindrome (30632023603).

The spelling of 20212002401 in words is "twenty billion, two hundred twelve million, two thousand, four hundred one".