1212001100222 has 32 divisors (see below), whose sum is σ = 2100933863424. Its totient is φ = 518257187200.

The previous prime is 1212001100221. The next prime is 1212001100279. The reversal of 1212001100222 is 2220011002121.

It is a junction number, because it is equal to n+sod(n) for n = 1212001100197 and 1212001100206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212001100221) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 21953 + ... + 1557075.

It is an arithmetic number, because the mean of its divisors is an integer number (65654183232).

Almost surely, 2^{1212001100222} is an apocalyptic number.

1212001100222 is a deficient number, since it is larger than the sum of its proper divisors (888932763202).

1212001100222 is a wasteful number, since it uses less digits than its factorization.

1212001100222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537264.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1212001100222 its reverse (2220011002121), we get a palindrome (3432012102343).

The spelling of 1212001100222 in words is "one trillion, two hundred twelve billion, one million, one hundred thousand, two hundred twenty-two".