1211402412 has 48 divisors (see below), whose sum is σ = 3426192000. Its totient is φ = 367091280.

The previous prime is 1211402389. The next prime is 1211402453. The reversal of 1211402412 is 2142041121.

1211402412 is a `hidden beast` number, since 1 + 211 + 40 + 2 + 412 = 666.

It is a super-3 number, since 3×1211402412³ (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 an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 508662 + ... + 511037.

It is an arithmetic number, because the mean of its divisors is an integer number (71379000).

Almost surely, 2^1211402412 is an apocalyptic number.

1211402412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211402412 is an abundant number, since it is smaller than the sum of its proper divisors (2214789588).

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

1211402412 is a wasteful number, since it uses less digits than its factorization.

1211402412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019723 (or 1019715 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1211402412 is about 34805.2066794610. The cubic root of 1211402412 is about 1066.0137619415.

Adding to 1211402412 its reverse (2142041121), we get a palindrome (3353443533).

The spelling of 1211402412 in words is "one billion, two hundred eleven million, four hundred two thousand, four hundred twelve".