1212122122222 has 16 divisors (see below), whose sum is σ = 1984967315712. Its totient is φ = 550549392120.

The previous prime is 1212122122217. The next prime is 1212122122229. The reversal of 1212122122222 is 2222212212121.

It is a Harshad number since it is a multiple of its sum of digits (22).

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

It is a junction number, because it is equal to n+sod(n) for n = 1212122122193 and 1212122122202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212122122229) 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, 20730588 + ... + 20788975.

It is an arithmetic number, because the mean of its divisors is an integer number (124060457232).

Almost surely, 2^{1212122122222} is an apocalyptic number.

1212122122222 is a deficient number, since it is larger than the sum of its proper divisors (772845193490).

1212122122222 is a wasteful number, since it uses less digits than its factorization.

1212122122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41520903.

The product of its digits is 512, while the sum is 22.

Adding to 1212122122222 its reverse (2222212212121), we get a palindrome (3434334334343).

The spelling of 1212122122222 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty-two".