121530311 has 8 divisors (see below), whose sum is σ = 142645920. Its totient is φ = 101353248.

The previous prime is 121530307. The next prime is 121530319. The reversal of 121530311 is 113035121.

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

It is a cyclic number.

It is not a de Polignac number, because 121530311 - 2² = 121530307 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 121530311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121530319) 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, 234356 + ... + 234873.

It is an arithmetic number, because the mean of its divisors is an integer number (17830740).

Almost surely, 2^121530311 is an apocalyptic number.

121530311 is a deficient number, since it is larger than the sum of its proper divisors (21115609).

121530311 is an equidigital number, since it uses as much as digits as its factorization.

121530311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469273.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 121530311 is about 11024.0786916640. The cubic root of 121530311 is about 495.3302710359.

Adding to 121530311 its reverse (113035121), we get a palindrome (234565432).

The spelling of 121530311 in words is "one hundred twenty-one million, five hundred thirty thousand, three hundred eleven".