21213011030 has 16 divisors (see below), whose sum is σ = 38354649984. Its totient is φ = 8447153280.

The previous prime is 21213010999. The next prime is 21213011059. The reversal of 21213011030 is 3011031212.

It is a junction number, because it is equal to n+sod(n) for n = 21213010996 and 21213011014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4754051 + ... + 4758510.

It is an arithmetic number, because the mean of its divisors is an integer number (2397165624).

Almost surely, 2^21213011030 is an apocalyptic number.

21213011030 is a deficient number, since it is larger than the sum of its proper divisors (17141638954).

21213011030 is a wasteful number, since it uses less digits than its factorization.

21213011030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9512791.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21213011030 its reverse (3011031212), we get a palindrome (24224042242).

The spelling of 21213011030 in words is "twenty-one billion, two hundred thirteen million, eleven thousand, thirty".