21152111347 has 2 divisors, whose sum is σ = 21152111348. Its totient is φ = 21152111346.

The previous prime is 21152111329. The next prime is 21152111389. The reversal of 21152111347 is 74311125112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21152111347 - 2¹⁵ = 21152078579 is a prime.

It is not a weakly prime, because it can be changed into another prime (21152111317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10576055673 + 10576055674.

It is an arithmetic number, because the mean of its divisors is an integer number (10576055674).

Almost surely, 2^21152111347 is an apocalyptic number.

21152111347 is a deficient number, since it is larger than the sum of its proper divisors (1).

21152111347 is an equidigital number, since it uses as much as digits as its factorization.

21152111347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 28.

Adding to 21152111347 its reverse (74311125112), we get a palindrome (95463236459).

The spelling of 21152111347 in words is "twenty-one billion, one hundred fifty-two million, one hundred eleven thousand, three hundred forty-seven".