21053133401 has 2 divisors, whose sum is σ = 21053133402. Its totient is φ = 21053133400.

The previous prime is 21053133397. The next prime is 21053133463. The reversal of 21053133401 is 10433135012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18834817600 + 2218315801 = 137240^2 + 47099^2 .

It is a cyclic number.

It is not a de Polignac number, because 21053133401 - 2² = 21053133397 is a prime.

It is not a weakly prime, because it can be changed into another prime (21053133481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10526566700 + 10526566701.

It is an arithmetic number, because the mean of its divisors is an integer number (10526566701).

Almost surely, 2^21053133401 is an apocalyptic number.

It is an amenable number.

21053133401 is a deficient number, since it is larger than the sum of its proper divisors (1).

21053133401 is an equidigital number, since it uses as much as digits as its factorization.

21053133401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 21053133401 its reverse (10433135012), we get a palindrome (31486268413).

The spelling of 21053133401 in words is "twenty-one billion, fifty-three million, one hundred thirty-three thousand, four hundred one".