1211142341442 has 16 divisors (see below), whose sum is σ = 2642492381472. Its totient is φ = 367012830720.

The previous prime is 1211142341441. The next prime is 1211142341443. The reversal of 1211142341442 is 2441432411121.

It is an interprime number because it is at equal distance from previous prime (1211142341441) and next prime (1211142341443).

It is a super-2 number, since 2×1211142341442² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211142341441) 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, 9175320703 + ... + 9175320834.

It is an arithmetic number, because the mean of its divisors is an integer number (165155773842).

Almost surely, 2^{1211142341442} is an apocalyptic number.

1211142341442 is an abundant number, since it is smaller than the sum of its proper divisors (1431350040030).

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

1211142341442 is a wasteful number, since it uses less digits than its factorization.

1211142341442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18350641553.

The product of its digits is 6144, while the sum is 30.

Adding to 1211142341442 its reverse (2441432411121), we get a palindrome (3652574752563).

The spelling of 1211142341442 in words is "one trillion, two hundred eleven billion, one hundred forty-two million, three hundred forty-one thousand, four hundred forty-two".