121340310 has 128 divisors (see below), whose sum is σ = 361912320. Its totient is φ = 25504128.

The previous prime is 121340299. The next prime is 121340347. The reversal of 121340310 is 13043121.

It is a super-2 number, since 2×121340310² = 29446941661792200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121340310.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 461239 + ... + 461501.

It is an arithmetic number, because the mean of its divisors is an integer number (2827440).

Almost surely, 2^121340310 is an apocalyptic number.

121340310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121340310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180956160).

121340310 is an abundant number, since it is smaller than the sum of its proper divisors (240572010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121340310 is a wasteful number, since it uses less digits than its factorization.

121340310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 121340310 is about 11015.4577753265. The cubic root of 121340310 is about 495.0720025859.

Adding to 121340310 its reverse (13043121), we get a palindrome (134383431).

The spelling of 121340310 in words is "one hundred twenty-one million, three hundred forty thousand, three hundred ten".