121040244020 has 48 divisors (see below), whose sum is σ = 255966480000. Its totient is φ = 48076924800.

The previous prime is 121040244007. The next prime is 121040244029. The reversal of 121040244020 is 20442040121.

It is a super-2 number, since 2×121040244020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121040243983 and 121040244001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121040244029) 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 15 ways as a sum of consecutive naturals, for example, 9956906 + ... + 9969054.

It is an arithmetic number, because the mean of its divisors is an integer number (5332635000).

Almost surely, 2^121040244020 is an apocalyptic number.

121040244020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121040244020 is an abundant number, since it is smaller than the sum of its proper divisors (134926235980).

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

121040244020 is a wasteful number, since it uses less digits than its factorization.

121040244020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15608 (or 15606 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 121040244020 its reverse (20442040121), we get a palindrome (141482284141).

The spelling of 121040244020 in words is "one hundred twenty-one billion, forty million, two hundred forty-four thousand, twenty".