1211430132 has 72 divisors (see below), whose sum is σ = 3537136512. Its totient is φ = 345504000.

The previous prime is 1211430131. The next prime is 1211430133. The reversal of 1211430132 is 2310341121.

It is an interprime number because it is at equal distance from previous prime (1211430131) and next prime (1211430133).

It is a super-3 number, since 3×1211430132³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211430131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83244 + ... + 96707.

It is an arithmetic number, because the mean of its divisors is an integer number (49126896).

Almost surely, 2^1211430132 is an apocalyptic number.

1211430132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211430132 is an abundant number, since it is smaller than the sum of its proper divisors (2325706380).

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

1211430132 is a wasteful number, since it uses less digits than its factorization.

1211430132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179989 (or 179984 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1211430132 is about 34805.6048934651. The cubic root of 1211430132 is about 1066.0218929242.

Adding to 1211430132 its reverse (2310341121), we get a palindrome (3521771253).

The spelling of 1211430132 in words is "one billion, two hundred eleven million, four hundred thirty thousand, one hundred thirty-two".