1012220205 has 32 divisors (see below), whose sum is σ = 1773964800. Its totient is φ = 490570752.

The previous prime is 1012220191. The next prime is 1012220227. The reversal of 1012220205 is 5020222101.

It is not a de Polignac number, because 1012220205 - 2⁵ = 1012220173 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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61045 + ... + 75834.

It is an arithmetic number, because the mean of its divisors is an integer number (55436400).

Almost surely, 2^1012220205 is an apocalyptic number.

1012220205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1012220205 is a deficient number, since it is larger than the sum of its proper divisors (761744595).

1012220205 is a wasteful number, since it uses less digits than its factorization.

1012220205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136933.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1012220205 is about 31815.4082953527. The cubic root of 1012220205 is about 1004.0569208032.

Adding to 1012220205 its reverse (5020222101), we get a palindrome (6032442306).

The spelling of 1012220205 in words is "one billion, twelve million, two hundred twenty thousand, two hundred five".