121020201002021 has 2 divisors, whose sum is σ = 121020201002022. Its totient is φ = 121020201002020.

The previous prime is 121020201001981. The next prime is 121020201002047. The reversal of 121020201002021 is 120200102020121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75465463171396 + 45554737830625 = 8687086^2 + 6749425^2 .

It is an emirp because it is prime and its reverse (120200102020121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121020201002021 - 2¹⁰ = 121020201000997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121020201001987 and 121020201002005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121020201032021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510100501010 + 60510100501011.

It is an arithmetic number, because the mean of its divisors is an integer number (60510100501011).

Almost surely, 2^{121020201002021} is an apocalyptic number.

It is an amenable number.

121020201002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121020201002021 is an equidigital number, since it uses as much as digits as its factorization.

121020201002021 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 14.

Adding to 121020201002021 its reverse (120200102020121), we get a palindrome (241220303022142).

The spelling of 121020201002021 in words is "one hundred twenty-one trillion, twenty billion, two hundred one million, two thousand, twenty-one".