121122210 has 96 divisors (see below), whose sum is σ = 325354176. Its totient is φ = 28828800.

The previous prime is 121122193. The next prime is 121122269. The reversal of 121122210 is 12221121.

It is a Curzon 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 47 ways as a sum of consecutive naturals, for example, 221157 + ... + 221703.

It is an arithmetic number, because the mean of its divisors is an integer number (3389106).

Almost surely, 2^121122210 is an apocalyptic number.

121122210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121122210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162677088).

121122210 is an abundant number, since it is smaller than the sum of its proper divisors (204231966).

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

121122210 is a wasteful number, since it uses less digits than its factorization.

121122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640 (or 629 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 121122210 is about 11005.5535980704. The cubic root of 121122210 is about 494.7752065724.

Adding to 121122210 its reverse (12221121), we get a palindrome (133343331).

The spelling of 121122210 in words is "one hundred twenty-one million, one hundred twenty-two thousand, two hundred ten".