1020120204001 has 4 divisors (see below), whose sum is σ = 1020778772500. Its totient is φ = 1019461635504.

The previous prime is 1020120203989. The next prime is 1020120204017. The reversal of 1020120204001 is 1004020210201.

It is a happy number.

1020120204001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 460937797776 + 559182406225 = 678924^2 + 747785^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020120204001 - 2³⁵ = 985760465633 is a prime.

It is a super-2 number, since 2×1020120204001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020120204031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329281926 + ... + 329285023.

It is an arithmetic number, because the mean of its divisors is an integer number (255194693125).

Almost surely, 2^{1020120204001} is an apocalyptic number.

It is an amenable number.

1020120204001 is a deficient number, since it is larger than the sum of its proper divisors (658568499).

1020120204001 is an equidigital number, since it uses as much as digits as its factorization.

1020120204001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658568498.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1020120204001 its reverse (1004020210201), we get a palindrome (2024140414202).

The spelling of 1020120204001 in words is "one trillion, twenty billion, one hundred twenty million, two hundred four thousand, one".