121211012002021 has 2 divisors, whose sum is σ = 121211012002022. Its totient is φ = 121211012002020.

The previous prime is 121211012001977. The next prime is 121211012002039. The reversal of 121211012002021 is 120200210112121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116240850065025 + 4970161936996 = 10781505^2 + 2229386^2 .

It is a cyclic number.

It is not a de Polignac number, because 121211012002021 - 2²¹ = 121211009904869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121211012001986 and 121211012002004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121211072002021) 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, 60605506001010 + 60605506001011.

It is an arithmetic number, because the mean of its divisors is an integer number (60605506001011).

Almost surely, 2^{121211012002021} is an apocalyptic number.

It is an amenable number.

121211012002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211012002021 is an equidigital number, since it uses as much as digits as its factorization.

121211012002021 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 121211012002021 its reverse (120200210112121), we get a palindrome (241411222114142).

The spelling of 121211012002021 in words is "one hundred twenty-one trillion, two hundred eleven billion, twelve million, two thousand, twenty-one".