1211003442 has 48 divisors (see below), whose sum is σ = 2867024160. Its totient is φ = 366374400.

The previous prime is 1211003441. The next prime is 1211003471. The reversal of 1211003442 is 2443001121.

1211003442 is a `hidden beast` number, since 121 + 100 + 3 + 442 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1211003441) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 125842 + ... + 135122.

It is an arithmetic number, because the mean of its divisors is an integer number (59729670).

Almost surely, 2^1211003442 is an apocalyptic number.

1211003442 is an abundant number, since it is smaller than the sum of its proper divisors (1656020718).

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

1211003442 is a wasteful number, since it uses less digits than its factorization.

1211003442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9959 (or 9956 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1211003442 is about 34799.4747374152. The cubic root of 1211003442 is about 1065.8967201267.

Adding to 1211003442 its reverse (2443001121), we get a palindrome (3654004563).

The spelling of 1211003442 in words is "one billion, two hundred eleven million, three thousand, four hundred forty-two".