1022211100 has 18 divisors (see below), whose sum is σ = 2218198304. Its totient is φ = 408884400.

The previous prime is 1022211097. The next prime is 1022211107. The reversal of 1022211100 is 11122201.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022211107) by changing a digit.

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, 5110956 + ... + 5111155.

Almost surely, 2^1022211100 is an apocalyptic number.

1022211100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022211100 is an abundant number, since it is smaller than the sum of its proper divisors (1195987204).

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

1022211100 is a wasteful number, since it uses less digits than its factorization.

1022211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10222125 (or 10222118 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1022211100 is about 31972.0362191713. The cubic root of 1022211100 is about 1007.3495517580.

Adding to 1022211100 its reverse (11122201), we get a palindrome (1033333301).

The spelling of 1022211100 in words is "one billion, twenty-two million, two hundred eleven thousand, one hundred".