121257153 has 12 divisors (see below), whose sum is σ = 175289088. Its totient is φ = 80773560.

The previous prime is 121257121. The next prime is 121257217. The reversal of 121257153 is 351752121.

It is not a de Polignac number, because 121257153 - 2⁵ = 121257121 is a prime.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (121257553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8368 + ... + 17678.

It is an arithmetic number, because the mean of its divisors is an integer number (14607424).

Almost surely, 2^121257153 is an apocalyptic number.

It is an amenable number.

121257153 is a deficient number, since it is larger than the sum of its proper divisors (54031935).

121257153 is a wasteful number, since it uses less digits than its factorization.

121257153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10764 (or 10761 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 121257153 is about 11011.6825689810. The cubic root of 121257153 is about 494.9588824126.

The spelling of 121257153 in words is "one hundred twenty-one million, two hundred fifty-seven thousand, one hundred fifty-three".