121310331 has 4 divisors (see below), whose sum is σ = 161747112. Its totient is φ = 80873552.

The previous prime is 121310327. The next prime is 121310333. The reversal of 121310331 is 133013121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121310331 - 2² = 121310327 is a prime.

It is a super-2 number, since 2×121310331² = 29432392814659122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121310331.

It is not an unprimeable number, because it can be changed into a prime (121310333) 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, 20218386 + ... + 20218391.

It is an arithmetic number, because the mean of its divisors is an integer number (40436778).

Almost surely, 2^121310331 is an apocalyptic number.

121310331 is a deficient number, since it is larger than the sum of its proper divisors (40436781).

121310331 is an equidigital number, since it uses as much as digits as its factorization.

121310331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40436780.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 121310331 is about 11014.0969216727. The cubic root of 121310331 is about 495.0312274963.

Adding to 121310331 its reverse (133013121), we get a palindrome (254323452).

The spelling of 121310331 in words is "one hundred twenty-one million, three hundred ten thousand, three hundred thirty-one".