121021011221011 has 16 divisors (see below), whose sum is σ = 138975752972160. Its totient is φ = 104225429479680.

The previous prime is 121021011220987. The next prime is 121021011221023. The reversal of 121021011221011 is 110122110120121.

It is a cyclic number.

It is not a de Polignac number, because 121021011221011 - 2⁷ = 121021011220883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121021011221111) 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, 2016286 + ... + 15687811.

It is an arithmetic number, because the mean of its divisors is an integer number (8685984560760).

Almost surely, 2^{121021011221011} is an apocalyptic number.

121021011221011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121021011221011 is a deficient number, since it is larger than the sum of its proper divisors (17954741751149).

121021011221011 is a wasteful number, since it uses less digits than its factorization.

121021011221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17736834.

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

Adding to 121021011221011 its reverse (110122110120121), we get a palindrome (231143121341132).

The spelling of 121021011221011 in words is "one hundred twenty-one trillion, twenty-one billion, eleven million, two hundred twenty-one thousand, eleven".