121252011042 has 16 divisors (see below), whose sum is σ = 242912973600. Its totient is φ = 40349178432.

The previous prime is 121252011007. The next prime is 121252011047. The reversal of 121252011042 is 240110252121.

It is not an unprimeable number, because it can be changed into a prime (121252011047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17035792 + ... + 17042907.

It is an arithmetic number, because the mean of its divisors is an integer number (15182060850).

Almost surely, 2^121252011042 is an apocalyptic number.

121252011042 is an abundant number, since it is smaller than the sum of its proper divisors (121660962558).

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

121252011042 is a wasteful number, since it uses less digits than its factorization.

121252011042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34079297.

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 121252011042 its reverse (240110252121), we get a palindrome (361362263163).

The spelling of 121252011042 in words is "one hundred twenty-one billion, two hundred fifty-two million, eleven thousand, forty-two".