1211401442 has 8 divisors (see below), whose sum is σ = 1824642732. Its totient is φ = 603187200.

The previous prime is 1211401441. The next prime is 1211401447. The reversal of 1211401442 is 2441041121.

It can be written as a sum of positive squares in 2 ways, for example, as 949317721 + 262083721 = 30811^2 + 16189^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1211401442³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211401441) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1256159 + ... + 1257122.

Almost surely, 2^1211401442 is an apocalyptic number.

1211401442 is a deficient number, since it is larger than the sum of its proper divisors (613241290).

1211401442 is a wasteful number, since it uses less digits than its factorization.

1211401442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513524.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 1211401442 is about 34805.1927447615. The cubic root of 1211401442 is about 1066.0134774135.

Adding to 1211401442 its reverse (2441041121), we get a palindrome (3652442563).

The spelling of 1211401442 in words is "one billion, two hundred eleven million, four hundred one thousand, four hundred forty-two".