21152212303 has 2 divisors, whose sum is σ = 21152212304. Its totient is φ = 21152212302.

The previous prime is 21152212069. The next prime is 21152212321. The reversal of 21152212303 is 30321225112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21152212303 - 2⁹ = 21152211791 is a prime.

It is a super-2 number, since 2×21152212303² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21152212363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10576106151 + 10576106152.

It is an arithmetic number, because the mean of its divisors is an integer number (10576106152).

Almost surely, 2^21152212303 is an apocalyptic number.

21152212303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21152212303 is an equidigital number, since it uses as much as digits as its factorization.

21152212303 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 22.

Adding to 21152212303 its reverse (30321225112), we get a palindrome (51473437415).

The spelling of 21152212303 in words is "twenty-one billion, one hundred fifty-two million, two hundred twelve thousand, three hundred three".