21234401124 has 12 divisors (see below), whose sum is σ = 49546935984. Its totient is φ = 7078133704.

The previous prime is 21234401101. The next prime is 21234401161. The reversal of 21234401124 is 42110443212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 21234401094 and 21234401103.

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, 884766702 + ... + 884766725.

It is an arithmetic number, because the mean of its divisors is an integer number (4128911332).

Almost surely, 2^21234401124 is an apocalyptic number.

It is an amenable number.

21234401124 is an abundant number, since it is smaller than the sum of its proper divisors (28312534860).

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

21234401124 is a wasteful number, since it uses less digits than its factorization.

21234401124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769533434 (or 1769533432 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21234401124 its reverse (42110443212), we get a palindrome (63344844336).

The spelling of 21234401124 in words is "twenty-one billion, two hundred thirty-four million, four hundred one thousand, one hundred twenty-four".