121214421440 has 56 divisors (see below), whose sum is σ = 329876395872. Its totient is φ = 41559229440.

The previous prime is 121214421439. The next prime is 121214421491. The reversal of 121214421440 is 44124412121.

It is a tau number, because it is divible by the number of its divisors (56).

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, 27054551 + ... + 27059030.

Almost surely, 2^121214421440 is an apocalyptic number.

121214421440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121214421440 is an abundant number, since it is smaller than the sum of its proper divisors (208661974432).

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

121214421440 is an equidigital number, since it uses as much as digits as its factorization.

121214421440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54113605 (or 54113595 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

Adding to 121214421440 its reverse (44124412121), we get a palindrome (165338833561).

The spelling of 121214421440 in words is "one hundred twenty-one billion, two hundred fourteen million, four hundred twenty-one thousand, four hundred forty".