121121210 has 16 divisors (see below), whose sum is σ = 249163776. Its totient is φ = 41527248.

The previous prime is 121121201. The next prime is 121121213. The reversal of 121121210 is 12121121.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121121191 and 121121200.

It is not an unprimeable number, because it can be changed into a prime (121121213) 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, 865082 + ... + 865221.

It is an arithmetic number, because the mean of its divisors is an integer number (15572736).

Almost surely, 2^121121210 is an apocalyptic number.

121121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121210 is an abundant number, since it is smaller than the sum of its proper divisors (128042566).

121121210 is a wasteful number, since it uses less digits than its factorization.

121121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730317.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 121121210 is about 11005.5081663683. The cubic root of 121121210 is about 494.7738449268.

Adding to 121121210 its reverse (12121121), we get a palindrome (133242331).

The spelling of 121121210 in words is "one hundred twenty-one million, one hundred twenty-one thousand, two hundred ten".