21021301131203 has 2 divisors, whose sum is σ = 21021301131204. Its totient is φ = 21021301131202.

The previous prime is 21021301131167. The next prime is 21021301131247. The reversal of 21021301131203 is 30213110312012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21021301131203 - 2³⁸ = 20746423224259 is a prime.

It is not a weakly prime, because it can be changed into another prime (21021301131283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510650565601 + 10510650565602.

It is an arithmetic number, because the mean of its divisors is an integer number (10510650565602).

Almost surely, 2^{21021301131203} is an apocalyptic number.

21021301131203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021301131203 is an equidigital number, since it uses as much as digits as its factorization.

21021301131203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21021301131203 its reverse (30213110312012), we get a palindrome (51234411443215).

The spelling of 21021301131203 in words is "twenty-one trillion, twenty-one billion, three hundred one million, one hundred thirty-one thousand, two hundred three".