1011212205 has 32 divisors (see below), whose sum is σ = 1706096640. Its totient is φ = 510027840.

The previous prime is 1011212177. The next prime is 1011212231. The reversal of 1011212205 is 5022121101.

It is not a de Polignac number, because 1011212205 - 2⁷ = 1011212077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177024 + ... + 182646.

It is an arithmetic number, because the mean of its divisors is an integer number (53315520).

Almost surely, 2^1011212205 is an apocalyptic number.

1011212205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1011212205 is a deficient number, since it is larger than the sum of its proper divisors (694884435).

1011212205 is a wasteful number, since it uses less digits than its factorization.

1011212205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6281.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 1011212205 is about 31799.5629686950. The cubic root of 1011212205 is about 1003.7235198582.

Adding to 1011212205 its reverse (5022121101), we get a palindrome (6033333306).

The spelling of 1011212205 in words is "one billion, eleven million, two hundred twelve thousand, two hundred five".