1020625302161 has 2 divisors, whose sum is σ = 1020625302162. Its totient is φ = 1020625302160.

The previous prime is 1020625302131. The next prime is 1020625302163. The reversal of 1020625302161 is 1612035260201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 859920527761 + 160704774400 = 927319^2 + 400880^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020625302161 - 2¹⁴ = 1020625285777 is a prime.

It is a super-2 number, since 2×1020625302161² (a number of 25 digits) contains 22 as substring.

Together with 1020625302163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1020625302163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510312651080 + 510312651081.

It is an arithmetic number, because the mean of its divisors is an integer number (510312651081).

Almost surely, 2^{1020625302161} is an apocalyptic number.

It is an amenable number.

1020625302161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020625302161 is an equidigital number, since it uses as much as digits as its factorization.

1020625302161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 1020625302161 in words is "one trillion, twenty billion, six hundred twenty-five million, three hundred two thousand, one hundred sixty-one".