121550010 has 16 divisors (see below), whose sum is σ = 291720096. Its totient is φ = 32413328.

The previous prime is 121549957. The next prime is 121550047. The reversal of 121550010 is 10055121.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2025804 + ... + 2025863.

It is an arithmetic number, because the mean of its divisors is an integer number (18232506).

Almost surely, 2^121550010 is an apocalyptic number.

121550010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121550010 is an abundant number, since it is smaller than the sum of its proper divisors (170170086).

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

121550010 is a wasteful number, since it uses less digits than its factorization.

121550010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4051677.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 121550010 is about 11024.9721088083. The cubic root of 121550010 is about 495.3570324909.

The spelling of 121550010 in words is "one hundred twenty-one million, five hundred fifty thousand, ten".