21213033130 has 8 divisors (see below), whose sum is σ = 38183459652. Its totient is φ = 8485213248.

The previous prime is 21213033097. The next prime is 21213033133. The reversal of 21213033130 is 3133031212.

It can be written as a sum of positive squares in 2 ways, for example, as 19099516401 + 2113516729 = 138201^2 + 45973^2 .

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 = 21213033098 and 21213033107.

It is not an unprimeable number, because it can be changed into a prime (21213033133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060651647 + ... + 1060651666.

Almost surely, 2^21213033130 is an apocalyptic number.

21213033130 is a deficient number, since it is larger than the sum of its proper divisors (16970426522).

21213033130 is a wasteful number, since it uses less digits than its factorization.

21213033130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121303320.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21213033130 its reverse (3133031212), we get a palindrome (24346064342).

The spelling of 21213033130 in words is "twenty-one billion, two hundred thirteen million, thirty-three thousand, one hundred thirty".