2221210012212 has 18 divisors (see below), whose sum is σ = 5614725308738. Its totient is φ = 740403337392.

The previous prime is 2221210012183. The next prime is 2221210012267. The reversal of 2221210012212 is 2122100121222.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1967157722916 + 254052289296 = 1402554^2 + 504036^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30850139023 + ... + 30850139094.

Almost surely, 2^{2221210012212} is an apocalyptic number.

It is an amenable number.

2221210012212 is an abundant number, since it is smaller than the sum of its proper divisors (3393515296526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2221210012212 is a wasteful number, since it uses less digits than its factorization.

2221210012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61700278127 (or 61700278122 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2221210012212 its reverse (2122100121222), we get a palindrome (4343310133434).

The spelling of 2221210012212 in words is "two trillion, two hundred twenty-one billion, two hundred ten million, twelve thousand, two hundred twelve".