21152353222313 has 16 divisors (see below), whose sum is σ = 21347194343040. Its totient is φ = 20958107488896.

The previous prime is 21152353222309. The next prime is 21152353222333. The reversal of 21152353222313 is 31322235325112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21152353222313 - 2² = 21152353222309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21152353222333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1122786548 + ... + 1122805386.

It is an arithmetic number, because the mean of its divisors is an integer number (1334199646440).

Almost surely, 2^{21152353222313} is an apocalyptic number.

It is an amenable number.

21152353222313 is a deficient number, since it is larger than the sum of its proper divisors (194841120727).

21152353222313 is a wasteful number, since it uses less digits than its factorization.

21152353222313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34096.

The product of its digits is 64800, while the sum is 35.

Adding to 21152353222313 its reverse (31322235325112), we get a palindrome (52474588547425).

The spelling of 21152353222313 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred fifty-three million, two hundred twenty-two thousand, three hundred thirteen".