121121020011010 has 16 divisors (see below), whose sum is σ = 221088509767872. Its totient is φ = 47766036060400.

The previous prime is 121121020011007. The next prime is 121121020011031. The reversal of 121121020011010 is 10110020121121.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 85296492256 + ... + 85296493675.

It is an arithmetic number, because the mean of its divisors is an integer number (13818031860492).

Almost surely, 2^{121121020011010} is an apocalyptic number.

121121020011010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121020011010 is a deficient number, since it is larger than the sum of its proper divisors (99967489756862).

121121020011010 is a wasteful number, since it uses less digits than its factorization.

121121020011010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170592986009.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121121020011010 its reverse (10110020121121), we get a palindrome (131231040132131).

The spelling of 121121020011010 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, twenty million, eleven thousand, ten".