21232021030 has 32 divisors (see below), whose sum is σ = 42104782368. Its totient is φ = 7644288000.

The previous prime is 21232021009. The next prime is 21232021039. The reversal of 21232021030 is 3012023212.

It is a junction number, because it is equal to n+sod(n) for n = 21232020995 and 21232021013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232021039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 944427 + ... + 966646.

It is an arithmetic number, because the mean of its divisors is an integer number (1315774449).

Almost surely, 2^21232021030 is an apocalyptic number.

21232021030 is a deficient number, since it is larger than the sum of its proper divisors (20872761338).

21232021030 is a wasteful number, since it uses less digits than its factorization.

21232021030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911192.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21232021030 its reverse (3012023212), we get a palindrome (24244044242).

The spelling of 21232021030 in words is "twenty-one billion, two hundred thirty-two million, twenty-one thousand, thirty".