1211000212222 has 16 divisors (see below), whose sum is σ = 1861226472672. Its totient is φ = 590598074880.

The previous prime is 1211000212157. The next prime is 1211000212223. The reversal of 1211000212222 is 2222120001121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1211000212196 and 1211000212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211000212223) 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, 1306803 + ... + 2032174.

It is an arithmetic number, because the mean of its divisors is an integer number (116326654542).

Almost surely, 2^{1211000212222} is an apocalyptic number.

1211000212222 is a deficient number, since it is larger than the sum of its proper divisors (650226260450).

1211000212222 is a wasteful number, since it uses less digits than its factorization.

1211000212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3343443.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1211000212222 its reverse (2222120001121), we get a palindrome (3433120213343).

The spelling of 1211000212222 in words is "one trillion, two hundred eleven billion, two hundred twelve thousand, two hundred twenty-two".