1121631705 has 80 divisors (see below), whose sum is σ = 2071992384. Its totient is φ = 580245120.

The previous prime is 1121631703. The next prime is 1121631733. The reversal of 1121631705 is 5071361211.

1121631705 is a `hidden beast` number, since 1 + 1 + 21 + 631 + 7 + 0 + 5 = 666.

It is not a de Polignac number, because 1121631705 - 2¹ = 1121631703 is a prime.

It is a super-2 number, since 2×1121631705² = 2516115363322414050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1121631701) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2050242 + ... + 2050788.

Almost surely, 2^1121631705 is an apocalyptic number.

1121631705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1121631705 is a deficient number, since it is larger than the sum of its proper divisors (950360679).

1121631705 is an equidigital number, since it uses as much as digits as its factorization.

1121631705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708 (or 699 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 1121631705 is about 33490.7704450047. The cubic root of 1121631705 is about 1039.0028981909.

Adding to 1121631705 its reverse (5071361211), we get a palindrome (6192992916).

The spelling of 1121631705 in words is "one billion, one hundred twenty-one million, six hundred thirty-one thousand, seven hundred five".