121830270 has 64 divisors (see below), whose sum is σ = 307734336. Its totient is φ = 30827520.

The previous prime is 121830257. The next prime is 121830271. The reversal of 121830270 is 72038121.

It is a super-2 number, since 2×121830270² = 29685229376545800, 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 121830270.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121830271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44172 + ... + 46848.

It is an arithmetic number, because the mean of its divisors is an integer number (4808349).

Almost surely, 2^121830270 is an apocalyptic number.

121830270 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 121830270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153867168).

121830270 is an abundant number, since it is smaller than the sum of its proper divisors (185904066).

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

121830270 is a wasteful number, since it uses less digits than its factorization.

121830270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 121830270 is about 11037.6750269248. The cubic root of 121830270 is about 495.7374580689.

Adding to 121830270 its reverse (72038121), we get a palindrome (193868391).

The spelling of 121830270 in words is "one hundred twenty-one million, eight hundred thirty thousand, two hundred seventy".