121001012120621 has 2 divisors, whose sum is σ = 121001012120622. Its totient is φ = 121001012120620.

The previous prime is 121001012120617. The next prime is 121001012120657. The reversal of 121001012120621 is 126021210100121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116834718798121 + 4166293322500 = 10809011^2 + 2041150^2 .

It is a cyclic number.

It is not a de Polignac number, because 121001012120621 - 2² = 121001012120617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121001012120593 and 121001012120602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121001012125621) 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, 60500506060310 + 60500506060311.

It is an arithmetic number, because the mean of its divisors is an integer number (60500506060311).

Almost surely, 2^{121001012120621} is an apocalyptic number.

It is an amenable number.

121001012120621 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001012120621 is an equidigital number, since it uses as much as digits as its factorization.

121001012120621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 121001012120621 its reverse (126021210100121), we get a palindrome (247022222220742).

The spelling of 121001012120621 in words is "one hundred twenty-one trillion, one billion, twelve million, one hundred twenty thousand, six hundred twenty-one".