121640010 has 16 divisors (see below), whose sum is σ = 291936096. Its totient is φ = 32437328.

The previous prime is 121640003. The next prime is 121640017. The reversal of 121640010 is 10046121.

It is an interprime number because it is at equal distance from previous prime (121640003) and next prime (121640017).

It is a super-3 number, since 3×121640010³ (a number of 25 digits) contains 333 as substring.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121640017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2027304 + ... + 2027363.

It is an arithmetic number, because the mean of its divisors is an integer number (18246006).

Almost surely, 2^121640010 is an apocalyptic number.

121640010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121640010 is an abundant number, since it is smaller than the sum of its proper divisors (170296086).

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

121640010 is a wasteful number, since it uses less digits than its factorization.

121640010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4054677.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 121640010 is about 11029.0529965179. The cubic root of 121640010 is about 495.4792623836.

Adding to 121640010 its reverse (10046121), we get a palindrome (131686131).

The spelling of 121640010 in words is "one hundred twenty-one million, six hundred forty thousand, ten".