21111230324 has 24 divisors (see below), whose sum is σ = 37029182400. Its totient is φ = 10531495040.

The previous prime is 21111230291. The next prime is 21111230339. The reversal of 21111230324 is 42303211112.

It is a junction number, because it is equal to n+sod(n) for n = 21111230296 and 21111230305.

It is a congruent number.

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, 3588017 + ... + 3593895.

It is an arithmetic number, because the mean of its divisors is an integer number (1542882600).

Almost surely, 2^21111230324 is an apocalyptic number.

It is an amenable number.

21111230324 is a deficient number, since it is larger than the sum of its proper divisors (15917952076).

21111230324 is a wasteful number, since it uses less digits than its factorization.

21111230324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7783 (or 7781 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21111230324 its reverse (42303211112), we get a palindrome (63414441436).

The spelling of 21111230324 in words is "twenty-one billion, one hundred eleven million, two hundred thirty thousand, three hundred twenty-four".