117121420 has 48 divisors (see below), whose sum is σ = 271359648. Its totient is φ = 42186240.

The previous prime is 117121399. The next prime is 117121457. The reversal of 117121420 is 24121711.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5167 + ... + 16153.

It is an arithmetic number, because the mean of its divisors is an integer number (5653326).

Almost surely, 2^117121420 is an apocalyptic number.

117121420 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 117121420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135679824).

117121420 is an abundant number, since it is smaller than the sum of its proper divisors (154238228).

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

117121420 is a wasteful number, since it uses less digits than its factorization.

117121420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11050 (or 11048 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 117121420 is about 10822.2650124639. The cubic root of 117121420 is about 489.2664576018.

The spelling of 117121420 in words is "one hundred seventeen million, one hundred twenty-one thousand, four hundred twenty".