212002242221 has 32 divisors (see below), whose sum is σ = 266455588608. Its totient is φ = 163862000640.

The previous prime is 212002242203. The next prime is 212002242223. The reversal of 212002242221 is 122242200212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212002242221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212002242193 and 212002242202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212002242223) 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, 7153991 + ... + 7183563.

It is an arithmetic number, because the mean of its divisors is an integer number (8326737144).

Almost surely, 2^212002242221 is an apocalyptic number.

It is an amenable number.

212002242221 is a deficient number, since it is larger than the sum of its proper divisors (54453346387).

212002242221 is a wasteful number, since it uses less digits than its factorization.

212002242221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30341.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 212002242221 its reverse (122242200212), we get a palindrome (334244442433).

The spelling of 212002242221 in words is "two hundred twelve billion, two million, two hundred forty-two thousand, two hundred twenty-one".