121005220311342 has 96 divisors (see below), whose sum is σ = 286047255128544. Its totient is φ = 38287742515200.

The previous prime is 121005220311317. The next prime is 121005220311347. The reversal of 121005220311342 is 243113022500121.

It is a happy number.

121005220311342 is a `hidden beast` number, since 1 + 2 + 1 + 0 + 0 + 5 + 2 + 2 + 0 + 311 + 342 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121005220311347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81326659 + ... + 82801182.

It is an arithmetic number, because the mean of its divisors is an integer number (2979658907589).

Almost surely, 2^{121005220311342} is an apocalyptic number.

121005220311342 is an abundant number, since it is smaller than the sum of its proper divisors (165042034817202).

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

121005220311342 is a wasteful number, since it uses less digits than its factorization.

121005220311342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164127936 (or 164127924 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 121005220311342 its reverse (243113022500121), we get a palindrome (364118242811463).

The spelling of 121005220311342 in words is "one hundred twenty-one trillion, five billion, two hundred twenty million, three hundred eleven thousand, three hundred forty-two".