1200000002020 has 24 divisors (see below), whose sum is σ = 2520130443768. Its totient is φ = 479975155200.

The previous prime is 1200000001999. The next prime is 1200000002027. The reversal of 1200000002020 is 202000000021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30370729984 + 1169629272036 = 174272^2 + 1081494^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1200000001994 and 1200000002012.

It is not an unprimeable number, because it can be changed into a prime (1200000002027) 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, 1154311 + ... + 1931950.

It is an arithmetic number, because the mean of its divisors is an integer number (105005435157).

Almost surely, 2^{1200000002020} is an apocalyptic number.

1200000002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200000002020 is an abundant number, since it is smaller than the sum of its proper divisors (1320130441748).

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

1200000002020 is a wasteful number, since it uses less digits than its factorization.

1200000002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3105711 (or 3105709 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

Adding to 1200000002020 its reverse (202000000021), we get a palindrome (1402000002041).

The spelling of 1200000002020 in words is "one trillion, two hundred billion, two thousand, twenty".