121012012102021 has 2 divisors, whose sum is σ = 121012012102022. Its totient is φ = 121012012102020.

The previous prime is 121012012101989. The next prime is 121012012102057. The reversal of 121012012102021 is 120201210210121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112496039152225 + 8515972949796 = 10606415^2 + 2918214^2 .

It is a cyclic number.

It is not a de Polignac number, because 121012012102021 - 2⁵ = 121012012101989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121012012101986 and 121012012102004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121012012112021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506006051010 + 60506006051011.

It is an arithmetic number, because the mean of its divisors is an integer number (60506006051011).

Almost surely, 2^{121012012102021} is an apocalyptic number.

It is an amenable number.

121012012102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121012012102021 is an equidigital number, since it uses as much as digits as its factorization.

121012012102021 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 16.

Adding to 121012012102021 its reverse (120201210210121), we get a palindrome (241213222312142).

The spelling of 121012012102021 in words is "one hundred twenty-one trillion, twelve billion, twelve million, one hundred two thousand, twenty-one".