1212100220222 has 16 divisors (see below), whose sum is σ = 1901978269200. Its totient is φ = 578577088320.

The previous prime is 1212100220197. The next prime is 1212100220237. The reversal of 1212100220222 is 2220220012121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212100220222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117400904 + ... + 117411227.

It is an arithmetic number, because the mean of its divisors is an integer number (118873641825).

Almost surely, 2^{1212100220222} is an apocalyptic number.

1212100220222 is a deficient number, since it is larger than the sum of its proper divisors (689878048978).

1212100220222 is a wasteful number, since it uses less digits than its factorization.

1212100220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234812251.

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

Adding to 1212100220222 its reverse (2220220012121), we get a palindrome (3432320232343).

The spelling of 1212100220222 in words is "one trillion, two hundred twelve billion, one hundred million, two hundred twenty thousand, two hundred twenty-two".