1002212100 has 54 divisors (see below), whose sum is σ = 3141380970. Its totient is φ = 267256320.

The previous prime is 1002212093. The next prime is 1002212119. The reversal of 1002212100 is 12122001.

1002212100 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 98247744 + 903964356 = 9912^2 + 30066^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 555885 + ... + 557684.

Almost surely, 2^1002212100 is an apocalyptic number.

1002212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002212100 is an abundant number, since it is smaller than the sum of its proper divisors (2139168870).

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

1002212100 is a wasteful number, since it uses less digits than its factorization.

1002212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113589 (or 1113579 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1002212100 is about 31657.7336523005. The cubic root of 1002212100 is about 1000.7368236243.

Adding to 1002212100 its reverse (12122001), we get a palindrome (1014334101).

Subtracting from 1002212100 its reverse (12122001), we obtain a palindrome (990090099).

It can be divided in two parts, 10022 and 12100, that added together give a palindrome (22122).

The spelling of 1002212100 in words is "one billion, two million, two hundred twelve thousand, one hundred".