1000021212200 has 24 divisors (see below), whose sum is σ = 2325049318830. Its totient is φ = 400008484800.

The previous prime is 1000021212199. The next prime is 1000021212241. The reversal of 1000021212200 is 22121200001.

It is a happy number.

1000021212200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 871164623044 + 128856589156 = 933362^2 + 358966^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2500052831 + ... + 2500053230.

Almost surely, 2^{1000021212200} is an apocalyptic number.

1000021212200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000021212200 is an abundant number, since it is smaller than the sum of its proper divisors (1325028106630).

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

1000021212200 is a wasteful number, since it uses less digits than its factorization.

1000021212200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000106077 (or 5000106068 counting only the distinct ones).

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

Adding to 1000021212200 its reverse (22121200001), we get a palindrome (1022142412201).

The spelling of 1000021212200 in words is "one trillion, twenty-one million, two hundred twelve thousand, two hundred".