1020642644201 has 4 divisors (see below), whose sum is σ = 1021615612500. Its totient is φ = 1019669675904.

The previous prime is 1020642644171. The next prime is 1020642644209. The reversal of 1020642644201 is 1024462460201.

1020642644201 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 945369234601 + 75273409600 = 972301^2 + 274360^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020642644201 - 2³⁰ = 1019568902377 is a prime.

It is a super-2 number, since 2×1020642644201² (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 (1020642644209) 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, 486482576 + ... + 486484673.

It is an arithmetic number, because the mean of its divisors is an integer number (255403903125).

Almost surely, 2^{1020642644201} is an apocalyptic number.

It is an amenable number.

1020642644201 is a deficient number, since it is larger than the sum of its proper divisors (972968299).

1020642644201 is an equidigital number, since it uses as much as digits as its factorization.

1020642644201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972968298.

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 1020642644201 in words is "one trillion, twenty billion, six hundred forty-two million, six hundred forty-four thousand, two hundred one".