121551395 has 8 divisors (see below), whose sum is σ = 166699104. Its totient is φ = 83349504.

The previous prime is 121551373. The next prime is 121551407. The reversal of 121551395 is 593155121.

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

It is a de Polignac number, because none of the positive numbers 2^k-121551395 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1736414 + ... + 1736483.

It is an arithmetic number, because the mean of its divisors is an integer number (20837388).

Almost surely, 2^121551395 is an apocalyptic number.

121551395 is a deficient number, since it is larger than the sum of its proper divisors (45147709).

121551395 is an equidigital number, since it uses as much as digits as its factorization.

121551395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3472909.

The product of its digits is 6750, while the sum is 32.

The square root of 121551395 is about 11025.0349205796. The cubic root of 121551395 is about 495.3589139302.

The spelling of 121551395 in words is "one hundred twenty-one million, five hundred fifty-one thousand, three hundred ninety-five".