1212211200222 has 144 divisors (see below), whose sum is σ = 2901362143680. Its totient is φ = 365504832000.

The previous prime is 1212211200217. The next prime is 1212211200271. The reversal of 1212211200222 is 2220021122121.

It is a happy number.

1212211200222 is a `hidden beast` number, since 1 + 21 + 221 + 1 + 200 + 222 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1212211200195 and 1212211200204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 753393354 + ... + 753394962.

It is an arithmetic number, because the mean of its divisors is an integer number (20148348220).

Almost surely, 2^{1212211200222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212211200222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1450681071840).

1212211200222 is an abundant number, since it is smaller than the sum of its proper divisors (1689150943458).

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

1212211200222 is a wasteful number, since it uses less digits than its factorization.

1212211200222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3151 (or 3137 counting only the distinct ones).

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

Adding to 1212211200222 its reverse (2220021122121), we get a palindrome (3432232322343).

The spelling of 1212211200222 in words is "one trillion, two hundred twelve billion, two hundred eleven million, two hundred thousand, two hundred twenty-two".