2221210212212 has 12 divisors (see below), whose sum is σ = 3887377654020. Its totient is φ = 1110530882496.

The previous prime is 2221210212191. The next prime is 2221210212227. The reversal of 2221210212212 is 2122120121222.

It can be written as a sum of positive squares in 2 ways, for example, as 16567293796 + 2204642918416 = 128714^2 + 1484804^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18488543 + ... + 18608294.

It is an arithmetic number, because the mean of its divisors is an integer number (323948137835).

Almost surely, 2^{2221210212212} is an apocalyptic number.

It is an amenable number.

2221210212212 is a deficient number, since it is larger than the sum of its proper divisors (1666167441808).

2221210212212 is a wasteful number, since it uses less digits than its factorization.

2221210212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37111810 (or 37111808 counting only the distinct ones).

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

Adding to 2221210212212 its reverse (2122120121222), we get a palindrome (4343330333434).

The spelling of 2221210212212 in words is "two trillion, two hundred twenty-one billion, two hundred ten million, two hundred twelve thousand, two hundred twelve".