1002020220161 has 2 divisors, whose sum is σ = 1002020220162. Its totient is φ = 1002020220160.

The previous prime is 1002020220109. The next prime is 1002020220221. The reversal of 1002020220161 is 1610220202001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 716282932225 + 285737287936 = 846335^2 + 534544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002020220161 - 2¹⁴ = 1002020203777 is a prime.

It is a super-2 number, since 2×1002020220161² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1002020220961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501010110080 + 501010110081.

It is an arithmetic number, because the mean of its divisors is an integer number (501010110081).

Almost surely, 2^{1002020220161} is an apocalyptic number.

It is an amenable number.

1002020220161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002020220161 is an equidigital number, since it uses as much as digits as its factorization.

1002020220161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1002020220161 its reverse (1610220202001), we get a palindrome (2612240422162).

The spelling of 1002020220161 in words is "one trillion, two billion, twenty million, two hundred twenty thousand, one hundred sixty-one".