1205101000 has 32 divisors (see below), whose sum is σ = 2819938680. Its totient is φ = 482040000.

The previous prime is 1205100943. The next prime is 1205101033. The reversal of 1205101000 is 1015021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 144817156 + 1060283844 = 12034^2 + 32562^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601551 + ... + 603550.

Almost surely, 2^1205101000 is an apocalyptic number.

1205101000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205101000 is an abundant number, since it is smaller than the sum of its proper divisors (1614837680).

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

1205101000 is a wasteful number, since it uses less digits than its factorization.

1205101000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205122 (or 1205108 counting only the distinct ones).

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

The square root of 1205101000 is about 34714.5646667217. The cubic root of 1205101000 is about 1064.1621688297.

Adding to 1205101000 its reverse (1015021), we get a palindrome (1206116021).

The spelling of 1205101000 in words is "one billion, two hundred five million, one hundred one thousand".