1020001012 has 6 divisors (see below), whose sum is σ = 1785001778. Its totient is φ = 510000504.

The previous prime is 1020001001. The next prime is 1020001013. The reversal of 1020001012 is 2101000201.

It can be written as a sum of positive squares in only one way, i.e., 557148816 + 462852196 = 23604^2 + 21514^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1020000986 and 1020001004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020001013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127500123 + ... + 127500130.

Almost surely, 2^1020001012 is an apocalyptic number.

It is an amenable number.

1020001012 is a deficient number, since it is larger than the sum of its proper divisors (765000766).

1020001012 is a wasteful number, since it uses less digits than its factorization.

1020001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255000257 (or 255000255 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1020001012 is about 31937.4546888133. The cubic root of 1020001012 is about 1006.6230424692.

Adding to 1020001012 its reverse (2101000201), we get a palindrome (3121001213).

The spelling of 1020001012 in words is "one billion, twenty million, one thousand, twelve".