121120210 has 16 divisors (see below), whose sum is σ = 220176792. Its totient is φ = 47968000.

The previous prime is 121120199. The next prime is 121120229. The reversal of 121120210 is 12021121.

It can be written as a sum of positive squares in 4 ways, for example, as 112423609 + 8696601 = 10603^2 + 2949^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

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 7 ways as a sum of consecutive naturals, for example, 58951 + ... + 60970.

Almost surely, 2^121120210 is an apocalyptic number.

121120210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121120210 is a deficient number, since it is larger than the sum of its proper divisors (99056582).

121120210 is a wasteful number, since it uses less digits than its factorization.

121120210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120029.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 121120210 is about 11005.4627344787. The cubic root of 121120210 is about 494.7724832737.

Adding to 121120210 its reverse (12021121), we get a palindrome (133141331).

The spelling of 121120210 in words is "one hundred twenty-one million, one hundred twenty thousand, two hundred ten".