1200001212020 has 48 divisors (see below), whose sum is σ = 2831842339200. Its totient is φ = 423813134976.

The previous prime is 1200001211999. The next prime is 1200001212041. The reversal of 1200001212020 is 202121000021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1200001211999) and next prime (1200001212041).

It is a junction number, because it is equal to n+sod(n) for n = 1200001211992 and 1200001212010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100328570 + ... + 100340529.

It is an arithmetic number, because the mean of its divisors is an integer number (58996715400).

Almost surely, 2^{1200001212020} is an apocalyptic number.

1200001212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200001212020 is an abundant number, since it is smaller than the sum of its proper divisors (1631841127180).

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

1200001212020 is a wasteful number, since it uses less digits than its factorization.

1200001212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200669144 (or 200669142 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1200001212020 its reverse (202121000021), we get a palindrome (1402122212041).

The spelling of 1200001212020 in words is "one trillion, two hundred billion, one million, two hundred twelve thousand, twenty".