102121021021021 has 2 divisors, whose sum is σ = 102121021021022. Its totient is φ = 102121021021020.

The previous prime is 102121021021009. The next prime is 102121021021027. The reversal of 102121021021021 is 120120120121201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100177798960996 + 1943222060025 = 10008886^2 + 1393995^2 .

It is a cyclic number.

It is not a de Polignac number, because 102121021021021 - 2¹⁵ = 102121020988253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102121021020986 and 102121021021004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102121021021027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060510510510 + 51060510510511.

It is an arithmetic number, because the mean of its divisors is an integer number (51060510510511).

Almost surely, 2^{102121021021021} is an apocalyptic number.

It is an amenable number.

102121021021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102121021021021 is an equidigital number, since it uses as much as digits as its factorization.

102121021021021 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 102121021021021 its reverse (120120120121201), we get a palindrome (222241141142222).

The spelling of 102121021021021 in words is "one hundred two trillion, one hundred twenty-one billion, twenty-one million, twenty-one thousand, twenty-one".