1212020000 has 60 divisors (see below), whose sum is σ = 2981800206. Its totient is φ = 484800000.

The previous prime is 1212019993. The next prime is 1212020009. The reversal of 1212020000 is 202121.

It can be written as a sum of positive squares in 5 ways, for example, as 187251856 + 1024768144 = 13684^2 + 32012^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1212020000.

It is not an unprimeable number, because it can be changed into a prime (1212020009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10301 + ... + 50300.

Almost surely, 2^1212020000 is an apocalyptic number.

1212020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212020000 is an abundant number, since it is smaller than the sum of its proper divisors (1769780206).

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

1212020000 is an frugal number, since it uses more digits than its factorization.

1212020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60631 (or 60608 counting only the distinct ones).

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

The square root of 1212020000 is about 34814.0776123682. The cubic root of 1212020000 is about 1066.1948868517.

Adding to 1212020000 its reverse (202121), we get a palindrome (1212222121).

The spelling of 1212020000 in words is "one billion, two hundred twelve million, twenty thousand".