121251355 has 8 divisors (see below), whose sum is σ = 145562112. Its totient is φ = 96960768.

The previous prime is 121251341. The next prime is 121251359. The reversal of 121251355 is 553152121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121251355 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121251359) 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, 16779 + ... + 22891.

It is an arithmetic number, because the mean of its divisors is an integer number (18195264).

Almost surely, 2^121251355 is an apocalyptic number.

121251355 is a deficient number, since it is larger than the sum of its proper divisors (24310757).

121251355 is an equidigital number, since it uses as much as digits as its factorization.

121251355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10085.

The product of its digits is 1500, while the sum is 25.

The square root of 121251355 is about 11011.4192999813. The cubic root of 121251355 is about 494.9509933458.

The spelling of 121251355 in words is "one hundred twenty-one million, two hundred fifty-one thousand, three hundred fifty-five".