213221033030021 has 32 divisors (see below), whose sum is σ = 239855445941760. Its totient is φ = 188728360943616.

The previous prime is 213221033030003. The next prime is 213221033030039. The reversal of 213221033030021 is 120030330122312.

It is an interprime number because it is at equal distance from previous prime (213221033030003) and next prime (213221033030039).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213221033030021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213221033030081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59128316 + ... + 62630661.

It is an arithmetic number, because the mean of its divisors is an integer number (7495482685680).

Almost surely, 2^{213221033030021} is an apocalyptic number.

It is an amenable number.

213221033030021 is a deficient number, since it is larger than the sum of its proper divisors (26634412911739).

213221033030021 is a wasteful number, since it uses less digits than its factorization.

213221033030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121759133.

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

Adding to 213221033030021 its reverse (120030330122312), we get a palindrome (333251363152333).

The spelling of 213221033030021 in words is "two hundred thirteen trillion, two hundred twenty-one billion, thirty-three million, thirty thousand, twenty-one".