121010101010 has 16 divisors (see below), whose sum is σ = 217841230872. Its totient is φ = 48398918400.

The previous prime is 121010101001. The next prime is 121010101019. The reversal of 121010101010 is 10101010121.

It is a happy number.

121010101010 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

121010101010 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (121010101001) and next prime (121010101019).

It can be written as a sum of positive squares in 4 ways, for example, as 79399404841 + 41610696169 = 281779^2 + 203987^2 .

It is an alternating number because its digits alternate between odd and even.

121010101010 is a modest number, since divided by 10101010 gives 1210 as remainder.

It is not an unprimeable number, because it can be changed into a prime (121010101019) 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 7 ways as a sum of consecutive naturals, for example, 540281 + ... + 730700.

Almost surely, 2^121010101010 is an apocalyptic number.

121010101010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121010101010 is a deficient number, since it is larger than the sum of its proper divisors (96831129862).

121010101010 is a wasteful number, since it uses less digits than its factorization.

121010101010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280509.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 121010101010 its reverse (10101010121), we get a palindrome (131111111131).

The spelling of 121010101010 in words is "one hundred twenty-one billion, ten million, one hundred one thousand, ten".