121011011024021 has 2 divisors, whose sum is σ = 121011011024022. Its totient is φ = 121011011024020.

The previous prime is 121011011024017. The next prime is 121011011024077. The reversal of 121011011024021 is 120420110110121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111255789501796 + 9755221522225 = 10547786^2 + 3123335^2 .

It is a cyclic number.

It is not a de Polignac number, because 121011011024021 - 2² = 121011011024017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121011011024221) 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 as a sum of consecutive naturals, namely, 60505505512010 + 60505505512011.

It is an arithmetic number, because the mean of its divisors is an integer number (60505505512011).

Almost surely, 2^{121011011024021} is an apocalyptic number.

It is an amenable number.

121011011024021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121011011024021 is an equidigital number, since it uses as much as digits as its factorization.

121011011024021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121011011024021 its reverse (120420110110121), we get a palindrome (241431121134142).

The spelling of 121011011024021 in words is "one hundred twenty-one trillion, eleven billion, eleven million, twenty-four thousand, twenty-one".