1212001212222 has 16 divisors (see below), whose sum is σ = 2693336027280. Its totient is φ = 404000404056.

The previous prime is 1212001212199. The next prime is 1212001212223. The reversal of 1212001212222 is 2222121002121.

It is a happy number.

1212001212222 is a `hidden beast` number, since 121 + 200 + 121 + 2 + 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 = 1212001212195 and 1212001212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212001212223) 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, 11222233393 + ... + 11222233500.

It is an arithmetic number, because the mean of its divisors is an integer number (168333501705).

Almost surely, 2^{1212001212222} is an apocalyptic number.

1212001212222 is an abundant number, since it is smaller than the sum of its proper divisors (1481334815058).

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

1212001212222 is a wasteful number, since it uses less digits than its factorization.

1212001212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22444466904 (or 22444466898 counting only the distinct ones).

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

Adding to 1212001212222 its reverse (2222121002121), we get a palindrome (3434122214343).

The spelling of 1212001212222 in words is "one trillion, two hundred twelve billion, one million, two hundred twelve thousand, two hundred twenty-two".