1212222212020 has 24 divisors (see below), whose sum is σ = 2545865245224. Its totient is φ = 484851056256.

The previous prime is 1212222212009. The next prime is 1212222212023. The reversal of 1212222212020 is 202122222121.

It can be written as a sum of positive squares in 4 ways, for example, as 260122440484 + 952099771536 = 510022^2 + 975756^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212222212023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2100799 + ... + 2614918.

It is an arithmetic number, because the mean of its divisors is an integer number (106077718551).

Almost surely, 2^{1212222212020} is an apocalyptic number.

1212222212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212222212020 is an abundant number, since it is smaller than the sum of its proper divisors (1333643033204).

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

1212222212020 is a wasteful number, since it uses less digits than its factorization.

1212222212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4728579 (or 4728577 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1212222212020 its reverse (202122222121), we get a palindrome (1414344434141).

The spelling of 1212222212020 in words is "one trillion, two hundred twelve billion, two hundred twenty-two million, two hundred twelve thousand, twenty".