121040213504 has 80 divisors (see below), whose sum is σ = 277187988000. Its totient is φ = 51725205504.

The previous prime is 121040213467. The next prime is 121040213513. The reversal of 121040213504 is 405312040121.

It is a self number, because there is not a number n which added to its sum of digits gives 121040213504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1202432 + ... + 1299200.

It is an arithmetic number, because the mean of its divisors is an integer number (3464849850).

Almost surely, 2^121040213504 is an apocalyptic number.

121040213504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121040213504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138593994000).

121040213504 is an abundant number, since it is smaller than the sum of its proper divisors (156147774496).

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

121040213504 is an frugal number, since it uses more digits than its factorization.

121040213504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97143 (or 97127 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 121040213504 its reverse (405312040121), we get a palindrome (526352253625).

The spelling of 121040213504 in words is "one hundred twenty-one billion, forty million, two hundred thirteen thousand, five hundred four".