121423440320440 has 32 divisors (see below), whose sum is σ = 273773101392000. Its totient is φ = 48467978675584.

The previous prime is 121423440320419. The next prime is 121423440320471. The reversal of 121423440320440 is 44023044324121.

It is a junction number, because it is equal to n+sod(n) for n = 121423440320396 and 121423440320405.

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, 3168650995 + ... + 3168689314.

It is an arithmetic number, because the mean of its divisors is an integer number (8555409418500).

Almost surely, 2^{121423440320440} is an apocalyptic number.

121423440320440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121423440320440 is an abundant number, since it is smaller than the sum of its proper divisors (152349661071560).

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

121423440320440 is a wasteful number, since it uses less digits than its factorization.

121423440320440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6337340799 (or 6337340795 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 121423440320440 its reverse (44023044324121), we get a palindrome (165446484644561).

The spelling of 121423440320440 in words is "one hundred twenty-one trillion, four hundred twenty-three billion, four hundred forty million, three hundred twenty thousand, four hundred forty".