1211311130 has 16 divisors (see below), whose sum is σ = 2206630944. Its totient is φ = 478686480.

The previous prime is 1211311117. The next prime is 1211311133. The reversal of 1211311130 is 311131121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1211311133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 728876 + ... + 730535.

It is an arithmetic number, because the mean of its divisors is an integer number (137914434).

Almost surely, 2^1211311130 is an apocalyptic number.

1211311130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211311130 is a deficient number, since it is larger than the sum of its proper divisors (995319814).

1211311130 is a wasteful number, since it uses less digits than its factorization.

1211311130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459501.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1211311130 is about 34803.8953279658. The cubic root of 1211311130 is about 1065.9869857270.

Adding to 1211311130 its reverse (311131121), we get a palindrome (1522442251).

Subtracting from 1211311130 its reverse (311131121), we obtain a square (900180009 = 30003²).

The spelling of 1211311130 in words is "one billion, two hundred eleven million, three hundred eleven thousand, one hundred thirty".