21323220111152 has 20 divisors (see below), whose sum is σ = 41321465657976. Its totient is φ = 10659616070400.

The previous prime is 21323220111143. The next prime is 21323220111173. The reversal of 21323220111152 is 25111102232312.

It is a happy number.

It is a super-2 number, since 2×21323220111152² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124535849 + ... + 124706952.

Almost surely, 2^{21323220111152} is an apocalyptic number.

It is an amenable number.

21323220111152 is a deficient number, since it is larger than the sum of its proper divisors (19998245546824).

21323220111152 is a wasteful number, since it uses less digits than its factorization.

21323220111152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249248156 (or 249248150 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 21323220111152 its reverse (25111102232312), we get a palindrome (46434322343464).

The spelling of 21323220111152 in words is "twenty-one trillion, three hundred twenty-three billion, two hundred twenty million, one hundred eleven thousand, one hundred fifty-two".