21141210401 has 2 divisors, whose sum is σ = 21141210402. Its totient is φ = 21141210400.

The previous prime is 21141210397. The next prime is 21141210407. The reversal of 21141210401 is 10401214112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14761035025 + 6380175376 = 121495^2 + 79876^2 .

It is a cyclic number.

It is not a de Polignac number, because 21141210401 - 2² = 21141210397 is a prime.

It is a super-3 number, since 3×21141210401³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21141210401.

It is not a weakly prime, because it can be changed into another prime (21141210407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570605200 + 10570605201.

It is an arithmetic number, because the mean of its divisors is an integer number (10570605201).

Almost surely, 2^21141210401 is an apocalyptic number.

It is an amenable number.

21141210401 is a deficient number, since it is larger than the sum of its proper divisors (1).

21141210401 is an equidigital number, since it uses as much as digits as its factorization.

21141210401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21141210401 its reverse (10401214112), we get a palindrome (31542424513).

The spelling of 21141210401 in words is "twenty-one billion, one hundred forty-one million, two hundred ten thousand, four hundred one".