121242510 has 48 divisors (see below), whose sum is σ = 315866304. Its totient is φ = 32266176.

The previous prime is 121242503. The next prime is 121242523. The reversal of 121242510 is 15242121.

It is a super-2 number, since 2×121242510² = 29399492462200200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57739 + ... + 59801.

It is an arithmetic number, because the mean of its divisors is an integer number (6580548).

Almost surely, 2^121242510 is an apocalyptic number.

121242510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121242510 is an abundant number, since it is smaller than the sum of its proper divisors (194623794).

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

121242510 is a wasteful number, since it uses less digits than its factorization.

121242510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2729 (or 2726 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 121242510 is about 11011.0176641399. The cubic root of 121242510 is about 494.9389578844.

Adding to 121242510 its reverse (15242121), we get a palindrome (136484631).

The spelling of 121242510 in words is "one hundred twenty-one million, two hundred forty-two thousand, five hundred ten".