121230420204140 has 96 divisors (see below), whose sum is σ = 276936244534656. Its totient is φ = 44310096230400.

The previous prime is 121230420204139. The next prime is 121230420204161. The reversal of 121230420204140 is 41402024032121.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133815929 + ... + 134718831.

It is an arithmetic number, because the mean of its divisors is an integer number (2884752547236).

Almost surely, 2^{121230420204140} is an apocalyptic number.

121230420204140 is a gapful number since it is divisible by the number (10) 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 121230420204140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138468122267328).

121230420204140 is an abundant number, since it is smaller than the sum of its proper divisors (155705824330516).

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

121230420204140 is a wasteful number, since it uses less digits than its factorization.

121230420204140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908139 (or 908137 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 121230420204140 its reverse (41402024032121), we get a palindrome (162632444236261).

The spelling of 121230420204140 in words is "one hundred twenty-one trillion, two hundred thirty billion, four hundred twenty million, two hundred four thousand, one hundred forty".