121010212021 has 2 divisors, whose sum is σ = 121010212022. Its totient is φ = 121010212020.

The previous prime is 121010212019. The next prime is 121010212031. The reversal of 121010212021 is 120212010121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77698775025 + 43311436996 = 278745^2 + 208114^2 .

It is a cyclic number.

It is not a de Polignac number, because 121010212021 - 2¹ = 121010212019 is a prime.

Together with 121010212019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 121010211992 and 121010212010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121010212031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505106010 + 60505106011.

It is an arithmetic number, because the mean of its divisors is an integer number (60505106011).

Almost surely, 2^121010212021 is an apocalyptic number.

It is an amenable number.

121010212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121010212021 is an equidigital number, since it uses as much as digits as its factorization.

121010212021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121010212021 its reverse (120212010121), we get a palindrome (241222222142).

The spelling of 121010212021 in words is "one hundred twenty-one billion, ten million, two hundred twelve thousand, twenty-one".