121011445140 has 96 divisors (see below), whose sum is σ = 356145189120. Its totient is φ = 30641335296.

The previous prime is 121011445127. The next prime is 121011445141. The reversal of 121011445140 is 41544110121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121011445140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011445141) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 130975 + ... + 509094.

It is an arithmetic number, because the mean of its divisors is an integer number (3709845720).

Almost surely, 2^121011445140 is an apocalyptic number.

121011445140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121011445140 is an abundant number, since it is smaller than the sum of its proper divisors (235133743980).

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

121011445140 is a wasteful number, since it uses less digits than its factorization.

121011445140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640241 (or 640239 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

Adding to 121011445140 its reverse (41544110121), we get a palindrome (162555555261).

The spelling of 121011445140 in words is "one hundred twenty-one billion, eleven million, four hundred forty-five thousand, one hundred forty".