212213203121 has 8 divisors (see below), whose sum is σ = 213580532160. Its totient is φ = 210846072528.

The previous prime is 212213203117. The next prime is 212213203177. The reversal of 212213203121 is 121302312212.

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 212213203121 - 2² = 212213203117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212213203093 and 212213203102.

It is not an unprimeable number, because it can be changed into a prime (212213253121) 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, 2523860 + ... + 2606586.

It is an arithmetic number, because the mean of its divisors is an integer number (26697566520).

Almost surely, 2^212213203121 is an apocalyptic number.

It is an amenable number.

212213203121 is a deficient number, since it is larger than the sum of its proper divisors (1367329039).

212213203121 is a wasteful number, since it uses less digits than its factorization.

212213203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99223.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212213203121 its reverse (121302312212), we get a palindrome (333515515333).

The spelling of 212213203121 in words is "two hundred twelve billion, two hundred thirteen million, two hundred three thousand, one hundred twenty-one".