1212123302020 has 24 divisors (see below), whose sum is σ = 2554921618200. Its totient is φ = 483046904832.

The previous prime is 1212123302011. The next prime is 1212123302021. The reversal of 1212123302020 is 202033212121.

It can be written as a sum of positive squares in 4 ways, for example, as 9183772224 + 1202939529796 = 95832^2 + 1096786^2 .

It is not an unprimeable number, because it can be changed into a prime (1212123302021) 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, 112645485 + ... + 112656244.

It is an arithmetic number, because the mean of its divisors is an integer number (106455067425).

Almost surely, 2^{1212123302020} is an apocalyptic number.

1212123302020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212123302020 is an abundant number, since it is smaller than the sum of its proper divisors (1342798316180).

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

1212123302020 is a wasteful number, since it uses less digits than its factorization.

1212123302020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225302007 (or 225302005 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1212123302020 its reverse (202033212121), we get a palindrome (1414156514141).

The spelling of 1212123302020 in words is "one trillion, two hundred twelve billion, one hundred twenty-three million, three hundred two thousand, twenty".