213222300021 has 16 divisors (see below), whose sum is σ = 316597965120. Its totient is φ = 141827315760.

The previous prime is 213222300019. The next prime is 213222300043. The reversal of 213222300021 is 120003222312.

213222300021 is a `hidden beast` number, since 21 + 322 + 2 + 300 + 0 + 21 = 666.

It is not a de Polignac number, because 213222300021 - 2¹ = 213222300019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213222299967 and 213222300003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213222300121) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8901270 + ... + 8925191.

It is an arithmetic number, because the mean of its divisors is an integer number (19787372820).

Almost surely, 2^213222300021 is an apocalyptic number.

It is an amenable number.

213222300021 is a deficient number, since it is larger than the sum of its proper divisors (103375665099).

213222300021 is a wasteful number, since it uses less digits than its factorization.

213222300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17826913 (or 17826907 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 213222300021 its reverse (120003222312), we get a palindrome (333225522333).

The spelling of 213222300021 in words is "two hundred thirteen billion, two hundred twenty-two million, three hundred thousand, twenty-one".