121535351 has 4 divisors (see below), whose sum is σ = 138897552. Its totient is φ = 104173152.

The previous prime is 121535347. The next prime is 121535369. The reversal of 121535351 is 153535121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 153535121 = 10501 ⋅14621.

It is a cyclic number.

It is not a de Polignac number, because 121535351 - 2² = 121535347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121535351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121535321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8681090 + ... + 8681103.

It is an arithmetic number, because the mean of its divisors is an integer number (34724388).

Almost surely, 2^121535351 is an apocalyptic number.

121535351 is a deficient number, since it is larger than the sum of its proper divisors (17362201).

121535351 is an equidigital number, since it uses as much as digits as its factorization.

121535351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17362200.

The product of its digits is 2250, while the sum is 26.

The square root of 121535351 is about 11024.3072798249. The cubic root of 121535351 is about 495.3371182442.

The spelling of 121535351 in words is "one hundred twenty-one million, five hundred thirty-five thousand, three hundred fifty-one".