21350160401 has 2 divisors, whose sum is σ = 21350160402. Its totient is φ = 21350160400.

The previous prime is 21350160361. The next prime is 21350160421. The reversal of 21350160401 is 10406105312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17483186176 + 3866974225 = 132224^2 + 62185^2 .

It is a cyclic number.

It is not a de Polignac number, because 21350160401 - 2³⁴ = 4170291217 is a prime.

It is not a weakly prime, because it can be changed into another prime (21350160421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10675080200 + 10675080201.

It is an arithmetic number, because the mean of its divisors is an integer number (10675080201).

Almost surely, 2^21350160401 is an apocalyptic number.

It is an amenable number.

21350160401 is a deficient number, since it is larger than the sum of its proper divisors (1).

21350160401 is an equidigital number, since it uses as much as digits as its factorization.

21350160401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 21350160401 its reverse (10406105312), we get a palindrome (31756265713).

The spelling of 21350160401 in words is "twenty-one billion, three hundred fifty million, one hundred sixty thousand, four hundred one".