121442645634 has 16 divisors (see below), whose sum is σ = 247001991840. Its totient is φ = 39794765120.

The previous prime is 121442645617. The next prime is 121442645647. The reversal of 121442645634 is 436546244121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171528807 + ... + 171529514.

It is an arithmetic number, because the mean of its divisors is an integer number (15437624490).

Almost surely, 2^121442645634 is an apocalyptic number.

121442645634 is an abundant number, since it is smaller than the sum of its proper divisors (125559346206).

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

121442645634 is a wasteful number, since it uses less digits than its factorization.

121442645634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343058385.

The product of its digits is 552960, while the sum is 42.

Adding to 121442645634 its reverse (436546244121), we get a palindrome (557988889755).

The spelling of 121442645634 in words is "one hundred twenty-one billion, four hundred forty-two million, six hundred forty-five thousand, six hundred thirty-four".