21213122030 has 16 divisors (see below), whose sum is σ = 38185277904. Its totient is φ = 8484880320.

The previous prime is 21213122027. The next prime is 21213122069. The reversal of 21213122030 is 3022131212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430985 + ... + 477675.

It is an arithmetic number, because the mean of its divisors is an integer number (2386579869).

Almost surely, 2^21213122030 is an apocalyptic number.

21213122030 is a deficient number, since it is larger than the sum of its proper divisors (16972155874).

21213122030 is a wasteful number, since it uses less digits than its factorization.

21213122030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92131.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21213122030 its reverse (3022131212), we get a palindrome (24235253242).

The spelling of 21213122030 in words is "twenty-one billion, two hundred thirteen million, one hundred twenty-two thousand, thirty".