1020000021169 has 2 divisors, whose sum is σ = 1020000021170. Its totient is φ = 1020000021168.

The previous prime is 1020000021133. The next prime is 1020000021247. The reversal of 1020000021169 is 9611200000201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 726764775025 + 293235246144 = 852505^2 + 541512^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020000021169 - 2²⁷ = 1019865803441 is a prime.

It is a super-2 number, since 2×1020000021169² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1020000022169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510000010584 + 510000010585.

It is an arithmetic number, because the mean of its divisors is an integer number (510000010585).

Almost surely, 2^{1020000021169} is an apocalyptic number.

It is an amenable number.

1020000021169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020000021169 is an equidigital number, since it uses as much as digits as its factorization.

1020000021169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 1020000021169 in words is "one trillion, twenty billion, twenty-one thousand, one hundred sixty-nine".