2012221212221 has 8 divisors (see below), whose sum is σ = 2195924205024. Its totient is φ = 1828647184720.

The previous prime is 2012221212181. The next prime is 2012221212257. The reversal of 2012221212221 is 1222121222102.

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 2012221212221 - 2²² = 2012217017917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2012221212193 and 2012221212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012221272221) 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, 32208695 + ... + 32271108.

It is an arithmetic number, because the mean of its divisors is an integer number (274490525628).

Almost surely, 2^{2012221212221} is an apocalyptic number.

It is an amenable number.

2012221212221 is a deficient number, since it is larger than the sum of its proper divisors (183702992803).

2012221212221 is a wasteful number, since it uses less digits than its factorization.

2012221212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64482651.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2012221212221 its reverse (1222121222102), we get a palindrome (3234342434323).

The spelling of 2012221212221 in words is "two trillion, twelve billion, two hundred twenty-one million, two hundred twelve thousand, two hundred twenty-one".