21232021024 has 48 divisors (see below), whose sum is σ = 44636901120. Its totient is φ = 9919284480.

The previous prime is 21232021009. The next prime is 21232021039. The reversal of 21232021024 is 42012023212.

It is an interprime number because it is at equal distance from previous prime (21232021009) and next prime (21232021039).

It is a junction number, because it is equal to n+sod(n) for n = 21232020992 and 21232021010.

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, 340254 + ... + 397789.

It is an arithmetic number, because the mean of its divisors is an integer number (929935440).

Almost surely, 2^21232021024 is an apocalyptic number.

It is an amenable number.

21232021024 is an abundant number, since it is smaller than the sum of its proper divisors (23404880096).

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

21232021024 is a wasteful number, since it uses less digits than its factorization.

21232021024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738113 (or 738105 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21232021024 its reverse (42012023212), we get a palindrome (63244044236).

The spelling of 21232021024 in words is "twenty-one billion, two hundred thirty-two million, twenty-one thousand, twenty-four".