3102120121021 has 2 divisors, whose sum is σ = 3102120121022. Its totient is φ = 3102120121020.

The previous prime is 3102120121003. The next prime is 3102120121069. The reversal of 3102120121021 is 1201210212013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2020915284921 + 1081204836100 = 1421589^2 + 1039810^2 .

It is a cyclic number.

It is not a de Polignac number, because 3102120121021 - 2²⁷ = 3101985903293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3102120120986 and 3102120121004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3102120121091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1551060060510 + 1551060060511.

It is an arithmetic number, because the mean of its divisors is an integer number (1551060060511).

Almost surely, 2^{3102120121021} is an apocalyptic number.

It is an amenable number.

3102120121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3102120121021 is an equidigital number, since it uses as much as digits as its factorization.

3102120121021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 3102120121021 its reverse (1201210212013), we get a palindrome (4303330333034).

The spelling of 3102120121021 in words is "three trillion, one hundred two billion, one hundred twenty million, one hundred twenty-one thousand, twenty-one".