1211040342 has 16 divisors (see below), whose sum is σ = 2691200880. Its totient is φ = 403680096.

The previous prime is 1211040307. The next prime is 1211040349. The reversal of 1211040342 is 2430401121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211040349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11213283 + ... + 11213390.

It is an arithmetic number, because the mean of its divisors is an integer number (168200055).

Almost surely, 2^1211040342 is an apocalyptic number.

1211040342 is an abundant number, since it is smaller than the sum of its proper divisors (1480160538).

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

1211040342 is a wasteful number, since it uses less digits than its factorization.

1211040342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22426684 (or 22426678 counting only the distinct ones).

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

The square root of 1211040342 is about 34800.0049137928. The cubic root of 1211040342 is about 1065.9075461872.

Adding to 1211040342 its reverse (2430401121), we get a palindrome (3641441463).

The spelling of 1211040342 in words is "one billion, two hundred eleven million, forty thousand, three hundred forty-two".