121121221011010 has 256 divisors, whose sum is σ = 259691562597888. Its totient is φ = 40184487936000.

The previous prime is 121121221010969. The next prime is 121121221011041. The reversal of 121121221011010 is 10110122121121.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 1888856809 + ... + 1888920931.

It is an arithmetic number, because the mean of its divisors is an integer number (1014420166398).

Almost surely, 2^{121121221011010} is an apocalyptic number.

121121221011010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121221011010 is an abundant number, since it is smaller than the sum of its proper divisors (138570341586878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121121221011010 is a wasteful number, since it uses less digits than its factorization.

121121221011010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64469.

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

Adding to 121121221011010 its reverse (10110122121121), we get a palindrome (131231343132131).

It can be divided in two parts, 1211212 and 21011010, that added together give a palindrome (22222222).

The spelling of 121121221011010 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty-one million, eleven thousand, ten".