1212020212122 has 64 divisors (see below), whose sum is σ = 2787483081600. Its totient is φ = 389903310720.

The previous prime is 1212020212111. The next prime is 1212020212129. The reversal of 1212020212122 is 2212120202121.

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 = 1212020212095 and 1212020212104.

It is not an unprimeable number, because it can be changed into a prime (1212020212129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3402393 + ... + 3741699.

It is an arithmetic number, because the mean of its divisors is an integer number (43554423150).

Almost surely, 2^{1212020212122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212020212122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1393741540800).

1212020212122 is an abundant number, since it is smaller than the sum of its proper divisors (1575462869478).

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

1212020212122 is a wasteful number, since it uses less digits than its factorization.

1212020212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341628 (or 341622 counting only the distinct ones).

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

Adding to 1212020212122 its reverse (2212120202121), we get a palindrome (3424140414243).

It can be divided in two parts, 12120202121 and 22, that multiplied together give a palindrome (266644446662).

The spelling of 1212020212122 in words is "one trillion, two hundred twelve billion, twenty million, two hundred twelve thousand, one hundred twenty-two".