121312030 has 64 divisors (see below), whose sum is σ = 261854208. Its totient is φ = 39594240.

The previous prime is 121312013. The next prime is 121312039. The reversal of 121312030 is 30213121.

It is a self number, because there is not a number n which added to its sum of digits gives 121312030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121312039) 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, 122919 + ... + 123901.

It is an arithmetic number, because the mean of its divisors is an integer number (4091472).

Almost surely, 2^121312030 is an apocalyptic number.

121312030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121312030 is an abundant number, since it is smaller than the sum of its proper divisors (140542178).

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

121312030 is a wasteful number, since it uses less digits than its factorization.

121312030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 121312030 is about 11014.1740498323. The cubic root of 121312030 is about 495.0335385227.

Adding to 121312030 its reverse (30213121), we get a palindrome (151525151).

It can be divided in two parts, 12131 and 2030, that added together give a square (14161 = 119²).

The spelling of 121312030 in words is "one hundred twenty-one million, three hundred twelve thousand, thirty".