121121212010 has 8 divisors (see below), whose sum is σ = 218018181636. Its totient is φ = 48448484800.

The previous prime is 121121211917. The next prime is 121121212057. The reversal of 121121212010 is 10212121121.

It can be written as a sum of positive squares in 2 ways, for example, as 119413786969 + 1707425041 = 345563^2 + 41321^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 6056060591 + ... + 6056060610.

Almost surely, 2^121121212010 is an apocalyptic number.

121121212010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121212010 is a deficient number, since it is larger than the sum of its proper divisors (96896969626).

121121212010 is a wasteful number, since it uses less digits than its factorization.

121121212010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12112121208.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121121212010 its reverse (10212121121), we get a palindrome (131333333131).

The spelling of 121121212010 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, ten".