21101302223 has 2 divisors, whose sum is σ = 21101302224. Its totient is φ = 21101302222.

The previous prime is 21101302199. The next prime is 21101302247. The reversal of 21101302223 is 32220310112.

It is a balanced prime because it is at equal distance from previous prime (21101302199) and next prime (21101302247).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21101302223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21101302423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550651111 + 10550651112.

It is an arithmetic number, because the mean of its divisors is an integer number (10550651112).

Almost surely, 2^21101302223 is an apocalyptic number.

21101302223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101302223 is an equidigital number, since it uses as much as digits as its factorization.

21101302223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21101302223 its reverse (32220310112), we get a palindrome (53321612335).

The spelling of 21101302223 in words is "twenty-one billion, one hundred one million, three hundred two thousand, two hundred twenty-three".