121403340020 has 24 divisors (see below), whose sum is σ = 255226906368. Its totient is φ = 48508023200.

The previous prime is 121403340013. The next prime is 121403340041. The reversal of 121403340020 is 20043304121.

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 = 121403339974 and 121403340001.

It is a congruent number.

It is an unprimeable number.

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, 3313376 + ... + 3349815.

It is an arithmetic number, because the mean of its divisors is an integer number (10634454432).

Almost surely, 2^121403340020 is an apocalyptic number.

121403340020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121403340020 is an abundant number, since it is smaller than the sum of its proper divisors (133823566348).

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

121403340020 is a wasteful number, since it uses less digits than its factorization.

121403340020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6664111 (or 6664109 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 121403340020 its reverse (20043304121), we get a palindrome (141446644141).

The spelling of 121403340020 in words is "one hundred twenty-one billion, four hundred three million, three hundred forty thousand, twenty".