21110415124 has 12 divisors (see below), whose sum is σ = 36979488000. Its totient is φ = 10544847128.

The previous prime is 21110415113. The next prime is 21110415127. The reversal of 21110415124 is 42151401112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21110415095 and 21110415104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110415127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2585524 + ... + 2593675.

It is an arithmetic number, because the mean of its divisors is an integer number (3081624000).

Almost surely, 2^21110415124 is an apocalyptic number.

It is an amenable number.

21110415124 is a deficient number, since it is larger than the sum of its proper divisors (15869072876).

21110415124 is a wasteful number, since it uses less digits than its factorization.

21110415124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5180222 (or 5180220 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 21110415124 its reverse (42151401112), we get a palindrome (63261816236).

The spelling of 21110415124 in words is "twenty-one billion, one hundred ten million, four hundred fifteen thousand, one hundred twenty-four".