212213030021 has 8 divisors (see below), whose sum is σ = 224706746880. Its totient is φ = 199720490688.

The previous prime is 212213030011. The next prime is 212213030041. The reversal of 212213030021 is 120030312212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212213030021 - 2¹⁴ = 212213013637 is a prime.

It is a super-2 number, since 2×212213030021² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212213030011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91100 + ... + 657818.

It is an arithmetic number, because the mean of its divisors is an integer number (28088343360).

Almost surely, 2^212213030021 is an apocalyptic number.

It is an amenable number.

212213030021 is a deficient number, since it is larger than the sum of its proper divisors (12493716859).

212213030021 is a wasteful number, since it uses less digits than its factorization.

212213030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588763.

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

Adding to 212213030021 its reverse (120030312212), we get a palindrome (332243342233).

The spelling of 212213030021 in words is "two hundred twelve billion, two hundred thirteen million, thirty thousand, twenty-one".