222121000002212 has 6 divisors (see below), whose sum is σ = 388711750003878. Its totient is φ = 111060500001104.

The previous prime is 222121000002203. The next prime is 222121000002257. The reversal of 222121000002212 is 212200000121222.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 178771232927296 + 43349767074916 = 13370536^2 + 6584054^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27765125000273 + ... + 27765125000280.

It is an arithmetic number, because the mean of its divisors is an integer number (64785291667313).

Almost surely, 2^{222121000002212} is an apocalyptic number.

It is an amenable number.

222121000002212 is a deficient number, since it is larger than the sum of its proper divisors (166590750001666).

222121000002212 is a wasteful number, since it uses less digits than its factorization.

222121000002212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55530250000557 (or 55530250000555 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222121000002212 its reverse (212200000121222), we get a palindrome (434321000123434).

The spelling of 222121000002212 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two thousand, two hundred twelve".