1012020020001 has 40 divisors (see below), whose sum is σ = 1646224747200. Its totient is φ = 617130148320.

The previous prime is 1012020019999. The next prime is 1012020020017. The reversal of 1012020020001 is 1000200202101.

It is not a de Polignac number, because 1012020020001 - 2¹ = 1012020019999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1012020020041) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11293005 + ... + 11382266.

It is an arithmetic number, because the mean of its divisors is an integer number (41155618680).

Almost surely, 2^{1012020020001} is an apocalyptic number.

It is an amenable number.

1012020020001 is a deficient number, since it is larger than the sum of its proper divisors (634204727199).

1012020020001 is a wasteful number, since it uses less digits than its factorization.

1012020020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22675331 (or 22675322 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1012020020001 its reverse (1000200202101), we get a palindrome (2012220222102).

The spelling of 1012020020001 in words is "one trillion, twelve billion, twenty million, twenty thousand, one".