212002212121 has 4 divisors (see below), whose sum is σ = 242288242432. Its totient is φ = 181716181812.

The previous prime is 212002212119. The next prime is 212002212193. The reversal of 212002212121 is 121212200212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212002212121 - 2¹ = 212002212119 is a prime.

It is a Duffinian number.

212002212121 is a modest number, since divided by 212121 gives 212002 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 212002212095 and 212002212104.

It is not an unprimeable number, because it can be changed into a prime (212002215121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15143015145 + ... + 15143015158.

It is an arithmetic number, because the mean of its divisors is an integer number (60572060608).

Almost surely, 2^212002212121 is an apocalyptic number.

It is an amenable number.

212002212121 is a deficient number, since it is larger than the sum of its proper divisors (30286030311).

212002212121 is an equidigital number, since it uses as much as digits as its factorization.

212002212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30286030310.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212002212121 its reverse (121212200212), we get a palindrome (333214412333).

The spelling of 212002212121 in words is "two hundred twelve billion, two million, two hundred twelve thousand, one hundred twenty-one".