21213023012330 has 64 divisors (see below), whose sum is σ = 39152521957248. Its totient is φ = 8273041244160.

The previous prime is 21213023012329. The next prime is 21213023012347. The reversal of 21213023012330 is 3321032031212.

It is a junction number, because it is equal to n+sod(n) for n = 21213023012296 and 21213023012305.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28046825 + ... + 28793235.

It is an arithmetic number, because the mean of its divisors is an integer number (611758155582).

Almost surely, 2^{21213023012330} is an apocalyptic number.

21213023012330 is a deficient number, since it is larger than the sum of its proper divisors (17939498944918).

21213023012330 is a wasteful number, since it uses less digits than its factorization.

21213023012330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746951.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21213023012330 its reverse (3321032031212), we get a palindrome (24534055043542).

The spelling of 21213023012330 in words is "twenty-one trillion, two hundred thirteen billion, twenty-three million, twelve thousand, three hundred thirty".