1002102022121 has 2 divisors, whose sum is σ = 1002102022122. Its totient is φ = 1002102022120.

The previous prime is 1002102022087. The next prime is 1002102022139. The reversal of 1002102022121 is 1212202012001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 501490585600 + 500611436521 = 708160^2 + 707539^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002102022121 - 2¹⁸ = 1002101759977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002102022096 and 1002102022105.

It is not a weakly prime, because it can be changed into another prime (1002102322121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501051011060 + 501051011061.

It is an arithmetic number, because the mean of its divisors is an integer number (501051011061).

Almost surely, 2^{1002102022121} is an apocalyptic number.

It is an amenable number.

1002102022121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002102022121 is an equidigital number, since it uses as much as digits as its factorization.

1002102022121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1002102022121 its reverse (1212202012001), we get a palindrome (2214304034122).

The spelling of 1002102022121 in words is "one trillion, two billion, one hundred two million, twenty-two thousand, one hundred twenty-one".