121329380 has 12 divisors (see below), whose sum is σ = 254791740. Its totient is φ = 48531744.

The previous prime is 121329371. The next prime is 121329389. The reversal of 121329380 is 83923121.

It is an interprime number because it is at equal distance from previous prime (121329371) and next prime (121329389).

It can be written as a sum of positive squares in 2 ways, for example, as 96668224 + 24661156 = 9832^2 + 4966^2 .

It is not an unprimeable number, because it can be changed into a prime (121329389) 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, 3033215 + ... + 3033254.

It is an arithmetic number, because the mean of its divisors is an integer number (21232645).

Almost surely, 2^121329380 is an apocalyptic number.

121329380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121329380 is an abundant number, since it is smaller than the sum of its proper divisors (133462360).

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

121329380 is a wasteful number, since it uses less digits than its factorization.

121329380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6066478 (or 6066476 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 121329380 is about 11014.9616431470. The cubic root of 121329380 is about 495.0571372333.

It can be divided in two parts, 12132 and 9380, that added together give a palindrome (21512).

The spelling of 121329380 in words is "one hundred twenty-one million, three hundred twenty-nine thousand, three hundred eighty".