1212212120022 has 16 divisors (see below), whose sum is σ = 2693804711280. Its totient is φ = 404070706656.

The previous prime is 1212212119957. The next prime is 1212212120023. The reversal of 1212212120022 is 2200212122121.

It is a happy number.

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 = 1212212119977 and 1212212120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212212120023) 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, 11224186243 + ... + 11224186350.

It is an arithmetic number, because the mean of its divisors is an integer number (168362794455).

Almost surely, 2^{1212212120022} is an apocalyptic number.

1212212120022 is an abundant number, since it is smaller than the sum of its proper divisors (1481592591258).

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

1212212120022 is a wasteful number, since it uses less digits than its factorization.

1212212120022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22448372604 (or 22448372598 counting only the distinct ones).

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

Adding to 1212212120022 its reverse (2200212122121), we get a palindrome (3412424242143).

The spelling of 1212212120022 in words is "one trillion, two hundred twelve billion, two hundred twelve million, one hundred twenty thousand, twenty-two".