121257201 has 8 divisors (see below), whose sum is σ = 174112960. Its totient is φ = 74619792.

The previous prime is 121257121. The next prime is 121257217. The reversal of 121257201 is 102752121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121257201 - 2²¹ = 119160049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121257281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1554541 + ... + 1554618.

It is an arithmetic number, because the mean of its divisors is an integer number (21764120).

Almost surely, 2^121257201 is an apocalyptic number.

It is an amenable number.

121257201 is a deficient number, since it is larger than the sum of its proper divisors (52855759).

121257201 is a wasteful number, since it uses less digits than its factorization.

121257201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109175.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 121257201 is about 11011.6847484842. The cubic root of 121257201 is about 494.9589477229.

The spelling of 121257201 in words is "one hundred twenty-one million, two hundred fifty-seven thousand, two hundred one".