21101210024 has 16 divisors (see below), whose sum is σ = 39567062400. Its totient is φ = 10549993392.

The previous prime is 21101210023. The next prime is 21101210041. The reversal of 21101210024 is 42001210112.

It is a happy number.

It is a super-2 number, since 2×21101210024² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21101209990 and 21101210008.

It is not an unprimeable number, because it can be changed into a prime (21101210021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92009 + ... + 225095.

It is an arithmetic number, because the mean of its divisors is an integer number (2472941400).

Almost surely, 2^21101210024 is an apocalyptic number.

It is an amenable number.

21101210024 is a deficient number, since it is larger than the sum of its proper divisors (18465852376).

21101210024 is a wasteful number, since it uses less digits than its factorization.

21101210024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152912 (or 152908 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21101210024 its reverse (42001210112), we get a palindrome (63102420136).

The spelling of 21101210024 in words is "twenty-one billion, one hundred one million, two hundred ten thousand, twenty-four".