21355410325133 has 2 divisors, whose sum is σ = 21355410325134. Its totient is φ = 21355410325132.

The previous prime is 21355410325129. The next prime is 21355410325141. The reversal of 21355410325133 is 33152301455312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19480597624489 + 1874812700644 = 4413683^2 + 1369238^2 .

It is a cyclic number.

It is not a de Polignac number, because 21355410325133 - 2² = 21355410325129 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21355410355133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10677705162566 + 10677705162567.

It is an arithmetic number, because the mean of its divisors is an integer number (10677705162567).

Almost surely, 2^{21355410325133} is an apocalyptic number.

It is an amenable number.

21355410325133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21355410325133 is an equidigital number, since it uses as much as digits as its factorization.

21355410325133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 38.

The spelling of 21355410325133 in words is "twenty-one trillion, three hundred fifty-five billion, four hundred ten million, three hundred twenty-five thousand, one hundred thirty-three".