21123232030 has 8 divisors (see below), whose sum is σ = 38021817672. Its totient is φ = 8449292808.

The previous prime is 21123231953. The next prime is 21123232049. The reversal of 21123232030 is 3023232112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21123231989 and 21123232007.

It is a congruent number.

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, 1056161592 + ... + 1056161611.

It is an arithmetic number, because the mean of its divisors is an integer number (4752727209).

Almost surely, 2^21123232030 is an apocalyptic number.

21123232030 is a deficient number, since it is larger than the sum of its proper divisors (16898585642).

21123232030 is a wasteful number, since it uses less digits than its factorization.

21123232030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112323210.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21123232030 its reverse (3023232112), we get a palindrome (24146464142).

The spelling of 21123232030 in words is "twenty-one billion, one hundred twenty-three million, two hundred thirty-two thousand, thirty".