21103244471 has 2 divisors, whose sum is σ = 21103244472. Its totient is φ = 21103244470.

The previous prime is 21103244453. The next prime is 21103244489. The reversal of 21103244471 is 17444230112.

It is a balanced prime because it is at equal distance from previous prime (21103244453) and next prime (21103244489).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21103244471 is a prime.

It is a super-3 number, since 3×21103244471³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21103249471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551622235 + 10551622236.

It is an arithmetic number, because the mean of its divisors is an integer number (10551622236).

Almost surely, 2^21103244471 is an apocalyptic number.

21103244471 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103244471 is an equidigital number, since it uses as much as digits as its factorization.

21103244471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 29.

Adding to 21103244471 its reverse (17444230112), we get a palindrome (38547474583).

The spelling of 21103244471 in words is "twenty-one billion, one hundred three million, two hundred forty-four thousand, four hundred seventy-one".