1211232130 has 16 divisors (see below), whose sum is σ = 2181203640. Its totient is φ = 484273792.

The previous prime is 1211232109. The next prime is 1211232131. The reversal of 1211232130 is 312321121.

It can be written as a sum of positive squares in 4 ways, for example, as 1200414609 + 10817521 = 34647^2 + 3289^2 .

It is not an unprimeable number, because it can be changed into a prime (1211232131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3139 + ... + 49318.

Almost surely, 2^1211232130 is an apocalyptic number.

1211232130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211232130 is a deficient number, since it is larger than the sum of its proper divisors (969971510).

1211232130 is a wasteful number, since it uses less digits than its factorization.

1211232130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54773.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1211232130 is about 34802.7603790274. The cubic root of 1211232130 is about 1065.9638111683.

Adding to 1211232130 its reverse (312321121), we get a palindrome (1523553251).

The spelling of 1211232130 in words is "one billion, two hundred eleven million, two hundred thirty-two thousand, one hundred thirty".