1212000002020 has 24 divisors (see below), whose sum is σ = 2570400008568. Its totient is φ = 480000000000.

The previous prime is 1212000001921. The next prime is 1212000002041. The reversal of 1212000002020 is 202000002121.

It can be written as a sum of positive squares in 4 ways, for example, as 83187250084 + 1128812751936 = 288422^2 + 1062456^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1212000001988 and 1212000002006.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299997981 + ... + 300002020.

It is an arithmetic number, because the mean of its divisors is an integer number (107100000357).

Almost surely, 2^{1212000002020} is an apocalyptic number.

1212000002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212000002020 is an abundant number, since it is smaller than the sum of its proper divisors (1358400006548).

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

1212000002020 is a wasteful number, since it uses less digits than its factorization.

1212000002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600000111 (or 600000109 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 1212000002020 its reverse (202000002121), we get a palindrome (1414000004141).

The spelling of 1212000002020 in words is "one trillion, two hundred twelve billion, two thousand, twenty".