21233213030 has 16 divisors (see below), whose sum is σ = 39032971200. Its totient is φ = 8312576832.

The previous prime is 21233213021. The next prime is 21233213041. The reversal of 21233213030 is 3031233212.

21233213030 = T₁₇₂₈₄ + T₁₇₂₈₅ + ... + T₁₇₄₂₄.

It is a junction number, because it is equal to n+sod(n) for n = 21233212993 and 21233213011.

It is a congruent number.

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, 22588055 + ... + 22588994.

It is an arithmetic number, because the mean of its divisors is an integer number (2439560700).

Almost surely, 2^21233213030 is an apocalyptic number.

21233213030 is a deficient number, since it is larger than the sum of its proper divisors (17799758170).

21233213030 is a wasteful number, since it uses less digits than its factorization.

21233213030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45177103.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21233213030 its reverse (3031233212), we get a palindrome (24264446242).

The spelling of 21233213030 in words is "twenty-one billion, two hundred thirty-three million, two hundred thirteen thousand, thirty".