1020123001 has 2 divisors, whose sum is σ = 1020123002. Its totient is φ = 1020123000.

The previous prime is 1020122993. The next prime is 1020123017. The reversal of 1020123001 is 1003210201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 877344400 + 142778601 = 29620^2 + 11949^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020123001 - 2³ = 1020122993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020123901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510061500 + 510061501.

It is an arithmetic number, because the mean of its divisors is an integer number (510061501).

Almost surely, 2^1020123001 is an apocalyptic number.

It is an amenable number.

1020123001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020123001 is an equidigital number, since it uses as much as digits as its factorization.

1020123001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1020123001 is about 31939.3644426435. The cubic root of 1020123001 is about 1006.6631705481.

Adding to 1020123001 its reverse (1003210201), we get a palindrome (2023333202).

The spelling of 1020123001 in words is "one billion, twenty million, one hundred twenty-three thousand, one".