1021201100 has 18 divisors (see below), whose sum is σ = 2216006604. Its totient is φ = 408480400.

The previous prime is 1021201079. The next prime is 1021201117. The reversal of 1021201100 is 11021201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5105906 + ... + 5106105.

It is an arithmetic number, because the mean of its divisors is an integer number (123111478).

Almost surely, 2^1021201100 is an apocalyptic number.

1021201100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021201100 is an abundant number, since it is smaller than the sum of its proper divisors (1194805504).

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

1021201100 is a wasteful number, since it uses less digits than its factorization.

1021201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10212025 (or 10212018 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1021201100 is about 31956.2372628568. The cubic root of 1021201100 is about 1007.0176704336.

Adding to 1021201100 its reverse (11021201), we get a palindrome (1032222301).

The spelling of 1021201100 in words is "one billion, twenty-one million, two hundred one thousand, one hundred".