1211412042 has 24 divisors (see below), whose sum is σ = 2695666116. Its totient is φ = 392890176.

The previous prime is 1211412029. The next prime is 1211412071. The reversal of 1211412042 is 2402141121.

1211412042 is a `hidden beast` number, since 1 + 211 + 412 + 0 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1185493761 + 25918281 = 34431^2 + 5091^2 .

It is a super-3 number, since 3×1211412042³ (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 (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 908803 + ... + 910134.

Almost surely, 2^1211412042 is an apocalyptic number.

1211412042 is an abundant number, since it is smaller than the sum of its proper divisors (1484254074).

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

1211412042 is a wasteful number, since it uses less digits than its factorization.

1211412042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818982 (or 1818979 counting only the distinct ones).

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

The square root of 1211412042 is about 34805.3450205568. The cubic root of 1211412042 is about 1066.0165866800.

Adding to 1211412042 its reverse (2402141121), we get a palindrome (3613553163).

The spelling of 1211412042 in words is "one billion, two hundred eleven million, four hundred twelve thousand, forty-two".