1020203000001 has 12 divisors (see below), whose sum is σ = 1475862719760. Its totient is φ = 679103257560.

The previous prime is 1020202999993. The next prime is 1020203000021. The reversal of 1020203000001 is 1000003020201.

It is a happy number.

It is not a de Polignac number, because 1020203000001 - 2³ = 1020202999993 is a prime.

It is a super-2 number, since 2×1020203000001² (a number of 25 digits) contains 22 as substring.

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 (1020203000021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86000055 + ... + 86011916.

It is an arithmetic number, because the mean of its divisors is an integer number (122988559980).

Almost surely, 2^{1020203000001} is an apocalyptic number.

It is an amenable number.

1020203000001 is a deficient number, since it is larger than the sum of its proper divisors (455659719759).

1020203000001 is a wasteful number, since it uses less digits than its factorization.

1020203000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172012636 (or 172012633 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 1020203000001 its reverse (1000003020201), we get a palindrome (2020206020202).

The spelling of 1020203000001 in words is "one trillion, twenty billion, two hundred three million, one", and thus it is an aban number.