2221212210212 has 6 divisors (see below), whose sum is σ = 3887121367878. Its totient is φ = 1110606105104.

The previous prime is 2221212210163. The next prime is 2221212210227. The reversal of 2221212210212 is 2120122121222.

It can be written as a sum of positive squares in only one way, i.e., 2121118436836 + 100093773376 = 1456406^2 + 316376^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277651526273 + ... + 277651526280.

It is an arithmetic number, because the mean of its divisors is an integer number (647853561313).

Almost surely, 2^{2221212210212} is an apocalyptic number.

It is an amenable number.

2221212210212 is a deficient number, since it is larger than the sum of its proper divisors (1665909157666).

2221212210212 is a wasteful number, since it uses less digits than its factorization.

2221212210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555303052557 (or 555303052555 counting only the distinct ones).

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

Adding to 2221212210212 its reverse (2120122121222), we get a palindrome (4341334331434).

The spelling of 2221212210212 in words is "two trillion, two hundred twenty-one billion, two hundred twelve million, two hundred ten thousand, two hundred twelve".