121202180 has 96 divisors (see below), whose sum is σ = 306996480. Its totient is φ = 39649280.

The previous prime is 121202177. The next prime is 121202189. The reversal of 121202180 is 81202121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (121202189) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85316 + ... + 86724.

It is an arithmetic number, because the mean of its divisors is an integer number (3197880).

Almost surely, 2^121202180 is an apocalyptic number.

121202180 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 121202180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153498240).

121202180 is an abundant number, since it is smaller than the sum of its proper divisors (185794300).

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

121202180 is a wasteful number, since it uses less digits than its factorization.

121202180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469 (or 1467 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 121202180 is about 11009.1861642903. The cubic root of 121202180 is about 494.8840731144.

The spelling of 121202180 in words is "one hundred twenty-one million, two hundred two thousand, one hundred eighty".