121010121121021 has 16 divisors (see below), whose sum is σ = 132321773102400. Its totient is φ = 109750319723520.

The previous prime is 121010121121003. The next prime is 121010121121027. The reversal of 121010121121021 is 120121121010121.

It is a cyclic number.

It is not a de Polignac number, because 121010121121021 - 2⁵ = 121010121120989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121010121120986 and 121010121121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010121121027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37636846 + ... + 40725328.

It is an arithmetic number, because the mean of its divisors is an integer number (8270110818900).

Almost surely, 2^{121010121121021} is an apocalyptic number.

121010121121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121010121121021 is a deficient number, since it is larger than the sum of its proper divisors (11311651981379).

121010121121021 is a wasteful number, since it uses less digits than its factorization.

121010121121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3096876.

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

Adding to 121010121121021 its reverse (120121121010121), we get a palindrome (241131242131142).

The spelling of 121010121121021 in words is "one hundred twenty-one trillion, ten billion, one hundred twenty-one million, one hundred twenty-one thousand, twenty-one".