201212222321 has 8 divisors (see below), whose sum is σ = 221677553088. Its totient is φ = 181109110000.

The previous prime is 201212222287. The next prime is 201212222329. The reversal of 201212222321 is 123222212102.

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 201212222321 - 2²² = 201208028017 is a prime.

It is a super-2 number, since 2×201212222321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201212222293 and 201212222302.

It is not an unprimeable number, because it can be changed into a prime (201212222329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90553445 + ... + 90555666.

It is an arithmetic number, because the mean of its divisors is an integer number (27709694136).

Almost surely, 2^201212222321 is an apocalyptic number.

It is an amenable number.

201212222321 is a deficient number, since it is larger than the sum of its proper divisors (20465330767).

201212222321 is a wasteful number, since it uses less digits than its factorization.

201212222321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181109223.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 201212222321 its reverse (123222212102), we get a palindrome (324434434423).

The spelling of 201212222321 in words is "two hundred one billion, two hundred twelve million, two hundred twenty-two thousand, three hundred twenty-one".