121406807393880 has 128 divisors (see below), whose sum is σ = 366718953182400. Its totient is φ = 32153258022912.

The previous prime is 121406807393831. The next prime is 121406807393897. The reversal of 121406807393880 is 88393708604121.

121406807393880 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×121406807393880² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37109086 + ... + 40247954.

Almost surely, 2^{121406807393880} is an apocalyptic number.

121406807393880 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 121406807393880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183359476591200).

121406807393880 is an abundant number, since it is smaller than the sum of its proper divisors (245312145788520).

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

121406807393880 is a wasteful number, since it uses less digits than its factorization.

121406807393880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3141093 (or 3141089 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 60.

The spelling of 121406807393880 in words is "one hundred twenty-one trillion, four hundred six billion, eight hundred seven million, three hundred ninety-three thousand, eight hundred eighty".