1212112212020 has 96 divisors (see below), whose sum is σ = 2728573948800. Its totient is φ = 450919401984.

The previous prime is 1212112211953. The next prime is 1212112212029. The reversal of 1212112212020 is 202122112121.

It is a self number, because there is not a number n which added to its sum of digits gives 1212112212020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212112212029) 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, 16396982 + ... + 16470738.

It is an arithmetic number, because the mean of its divisors is an integer number (28422645300).

Almost surely, 2^{1212112212020} is an apocalyptic number.

1212112212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212112212020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1364286974400).

1212112212020 is an abundant number, since it is smaller than the sum of its proper divisors (1516461736780).

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

1212112212020 is a wasteful number, since it uses less digits than its factorization.

1212112212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74577 (or 74575 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212112212020 its reverse (202122112121), we get a palindrome (1414234324141).

The spelling of 1212112212020 in words is "one trillion, two hundred twelve billion, one hundred twelve million, two hundred twelve thousand, twenty".