121010550 has 24 divisors (see below), whose sum is σ = 300106536. Its totient is φ = 32269440.

The previous prime is 121010537. The next prime is 121010551. The reversal of 121010550 is 55010121.

It is a super-2 number, since 2×121010550² = 29287106422605000, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010551) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 403219 + ... + 403518.

It is an arithmetic number, because the mean of its divisors is an integer number (12504439).

Almost surely, 2^121010550 is an apocalyptic number.

121010550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121010550 is an abundant number, since it is smaller than the sum of its proper divisors (179095986).

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

121010550 is a wasteful number, since it uses less digits than its factorization.

121010550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806752 (or 806747 counting only the distinct ones).

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

The square root of 121010550 is about 11000.4795350021. The cubic root of 121010550 is about 494.6231188995.

Adding to 121010550 its reverse (55010121), we get a palindrome (176020671).

The spelling of 121010550 in words is "one hundred twenty-one million, ten thousand, five hundred fifty".