121121212101010 has 16 divisors (see below), whose sum is σ = 237838016489472. Its totient is φ = 44044077127600.

The previous prime is 121121212100971. The next prime is 121121212101011. The reversal of 121121212101010 is 10101212121121.

It is a super-3 number, since 3×121121212101010³ (a number of 43 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121121212101011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550550963986 + ... + 550550964205.

It is an arithmetic number, because the mean of its divisors is an integer number (14864876030592).

Almost surely, 2^{121121212101010} is an apocalyptic number.

121121212101010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121212101010 is a deficient number, since it is larger than the sum of its proper divisors (116716804388462).

121121212101010 is a wasteful number, since it uses less digits than its factorization.

121121212101010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101101928209.

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

Adding to 121121212101010 its reverse (10101212121121), we get a palindrome (131222424222131).

The spelling of 121121212101010 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twelve million, one hundred one thousand, ten".