1212122121222 has 16 divisors (see below), whose sum is σ = 2424285306432. Its totient is φ = 404033863080.

The previous prime is 1212122121211. The next prime is 1212122121241. The reversal of 1212122121222 is 2221212212121.

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 in 7 ways as a sum of consecutive naturals, for example, 1320408 + ... + 2041499.

It is an arithmetic number, because the mean of its divisors is an integer number (151517831652).

Almost surely, 2^{1212122121222} is an apocalyptic number.

1212122121222 is an abundant number, since it is smaller than the sum of its proper divisors (1212163185210).

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

1212122121222 is a wasteful number, since it uses less digits than its factorization.

1212122121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3422003.

The product of its digits is 256, while the sum is 21.

Adding to 1212122121222 its reverse (2221212212121), we get a palindrome (3433334333343).

The spelling of 1212122121222 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-two".