1212222122222 has 4 divisors (see below), whose sum is σ = 1818333183336. Its totient is φ = 606111061110.

The previous prime is 1212222122161. The next prime is 1212222122359. The reversal of 1212222122222 is 2222212222121.

It is a semiprime because it is the product of two primes.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303055530554 + ... + 303055530557.

It is an arithmetic number, because the mean of its divisors is an integer number (454583295834).

Almost surely, 2^{1212222122222} is an apocalyptic number.

1212222122222 is a deficient number, since it is larger than the sum of its proper divisors (606111061114).

1212222122222 is an equidigital number, since it uses as much as digits as its factorization.

1212222122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606111061113.

The product of its digits is 1024, while the sum is 23.

Adding to 1212222122222 its reverse (2222212222121), we get a palindrome (3434434344343).

The spelling of 1212222122222 in words is "one trillion, two hundred twelve billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty-two".