21610404111203 has 2 divisors, whose sum is σ = 21610404111204. Its totient is φ = 21610404111202.

The previous prime is 21610404111199. The next prime is 21610404111217. The reversal of 21610404111203 is 30211140401612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21610404111203 - 2² = 21610404111199 is a prime.

It is a super-4 number, since 4×21610404111203⁴ (a number of 54 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (21610404111103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10805202055601 + 10805202055602.

It is an arithmetic number, because the mean of its divisors is an integer number (10805202055602).

Almost surely, 2^{21610404111203} is an apocalyptic number.

21610404111203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21610404111203 is an equidigital number, since it uses as much as digits as its factorization.

21610404111203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 21610404111203 its reverse (30211140401612), we get a palindrome (51821544512815).

The spelling of 21610404111203 in words is "twenty-one trillion, six hundred ten billion, four hundred four million, one hundred eleven thousand, two hundred three".