2021002102121 has 2 divisors, whose sum is σ = 2021002102122. Its totient is φ = 2021002102120.

The previous prime is 2021002102037. The next prime is 2021002102127. The reversal of 2021002102121 is 1212012001202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1018210156096 + 1002791946025 = 1009064^2 + 1001395^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021002102121 - 2³⁸ = 1746124195177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021002102096 and 2021002102105.

It is not a weakly prime, because it can be changed into another prime (2021002102127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010501051060 + 1010501051061.

It is an arithmetic number, because the mean of its divisors is an integer number (1010501051061).

Almost surely, 2^{2021002102121} is an apocalyptic number.

It is an amenable number.

2021002102121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021002102121 is an equidigital number, since it uses as much as digits as its factorization.

2021002102121 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 2021002102121 its reverse (1212012001202), we get a palindrome (3233014103323).

The spelling of 2021002102121 in words is "two trillion, twenty-one billion, two million, one hundred two thousand, one hundred twenty-one".