121403172 has 60 divisors (see below), whose sum is σ = 312050480. Its totient is φ = 36735600.

The previous prime is 121403153. The next prime is 121403201. The reversal of 121403172 is 271304121.

It is a super-3 number, since 3×121403172³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 175347 + ... + 176037.

Almost surely, 2^121403172 is an apocalyptic number.

121403172 is a gapful number since it is divisible by the number (12) 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 121403172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156025240).

121403172 is an abundant number, since it is smaller than the sum of its proper divisors (190647308).

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

121403172 is an equidigital number, since it uses as much as digits as its factorization.

121403172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742 (or 707 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 121403172 is about 11018.3107598216. The cubic root of 121403172 is about 495.1574807575.

Adding to 121403172 its reverse (271304121), we get a palindrome (392707293).

The spelling of 121403172 in words is "one hundred twenty-one million, four hundred three thousand, one hundred seventy-two".