21202101324 has 24 divisors (see below), whose sum is σ = 54968411120. Its totient is φ = 7067367072.

The previous prime is 21202101299. The next prime is 21202101331. The reversal of 21202101324 is 42310120212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21202101297 and 21202101306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98157769 + ... + 98157984.

Almost surely, 2^21202101324 is an apocalyptic number.

It is an amenable number.

21202101324 is an abundant number, since it is smaller than the sum of its proper divisors (33766309796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21202101324 is a wasteful number, since it uses less digits than its factorization.

21202101324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196315766 (or 196315758 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21202101324 its reverse (42310120212), we get a palindrome (63512221536).

The spelling of 21202101324 in words is "twenty-one billion, two hundred two million, one hundred one thousand, three hundred twenty-four".