21203133301249 has 2 divisors, whose sum is σ = 21203133301250. Its totient is φ = 21203133301248.

The previous prime is 21203133301211. The next prime is 21203133301271. The reversal of 21203133301249 is 94210333130212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17619048225025 + 3584085076224 = 4197505^2 + 1893168^2 .

It is a cyclic number.

It is not a de Polignac number, because 21203133301249 - 2⁴³ = 12407040279041 is a prime.

It is not a weakly prime, because it can be changed into another prime (21203133302249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601566650624 + 10601566650625.

It is an arithmetic number, because the mean of its divisors is an integer number (10601566650625).

Almost surely, 2^{21203133301249} is an apocalyptic number.

It is an amenable number.

21203133301249 is a deficient number, since it is larger than the sum of its proper divisors (1).

21203133301249 is an equidigital number, since it uses as much as digits as its factorization.

21203133301249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 34.

The spelling of 21203133301249 in words is "twenty-one trillion, two hundred three billion, one hundred thirty-three million, three hundred one thousand, two hundred forty-nine".