1211431412 has 24 divisors (see below), whose sum is σ = 2232854400. Its totient is φ = 573509376.

The previous prime is 1211431409. The next prime is 1211431427. The reversal of 1211431412 is 2141341121.

It is a super-3 number, since 3×1211431412³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

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, 177764 + ... + 184452.

It is an arithmetic number, because the mean of its divisors is an integer number (93035600).

Almost surely, 2^1211431412 is an apocalyptic number.

It is an amenable number.

1211431412 is a deficient number, since it is larger than the sum of its proper divisors (1021422988).

1211431412 is a wasteful number, since it uses less digits than its factorization.

1211431412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9095 (or 9093 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

The square root of 1211431412 is about 34805.6232813033. The cubic root of 1211431412 is about 1066.0222683778.

Adding to 1211431412 its reverse (2141341121), we get a palindrome (3352772533).

The spelling of 1211431412 in words is "one billion, two hundred eleven million, four hundred thirty-one thousand, four hundred twelve".