1201110121242 has 64 divisors (see below), whose sum is σ = 2764095160320. Its totient is φ = 386208874800.

The previous prime is 1201110121217. The next prime is 1201110121247. The reversal of 1201110121242 is 2421210111021.

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 (1201110121247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 632938 + ... + 1674165.

It is an arithmetic number, because the mean of its divisors is an integer number (43188986880).

Almost surely, 2^{1201110121242} is an apocalyptic number.

1201110121242 is an abundant number, since it is smaller than the sum of its proper divisors (1562985039078).

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

1201110121242 is a wasteful number, since it uses less digits than its factorization.

1201110121242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307456 (or 2307450 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1201110121242 its reverse (2421210111021), we get a palindrome (3622320232263).

The spelling of 1201110121242 in words is "one trillion, two hundred one billion, one hundred ten million, one hundred twenty-one thousand, two hundred forty-two".