1020045002621 has 4 divisors (see below), whose sum is σ = 1080047649852. Its totient is φ = 960042355392.

The previous prime is 1020045002609. The next prime is 1020045002737. The reversal of 1020045002621 is 1262005400201.

It is a happy number.

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 530149996996 + 489895005625 = 728114^2 + 699925^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020045002621 - 2³⁴ = 1002865133437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020045002021) 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, 30001323590 + ... + 30001323623.

It is an arithmetic number, because the mean of its divisors is an integer number (270011912463).

Almost surely, 2^{1020045002621} is an apocalyptic number.

It is an amenable number.

1020045002621 is a deficient number, since it is larger than the sum of its proper divisors (60002647231).

1020045002621 is an equidigital number, since it uses as much as digits as its factorization.

1020045002621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60002647230.

The product of its (nonzero) digits is 960, while the sum is 23.

The spelling of 1020045002621 in words is "one trillion, twenty billion, forty-five million, two thousand, six hundred twenty-one".