1020302312021 has 4 divisors (see below), whose sum is σ = 1020408592044. Its totient is φ = 1020196032000.

The previous prime is 1020302311997. The next prime is 1020302312041. The reversal of 1020302312021 is 1202132030201.

1020302312021 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 721164417796 + 299137894225 = 849214^2 + 546935^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020302312021 - 2²⁶ = 1020235203157 is a prime.

It is a super-2 number, since 2×1020302312021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020302312041) 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, 53125610 + ... + 53144811.

It is an arithmetic number, because the mean of its divisors is an integer number (255102148011).

Almost surely, 2^{1020302312021} is an apocalyptic number.

It is an amenable number.

1020302312021 is a deficient number, since it is larger than the sum of its proper divisors (106280023).

1020302312021 is an equidigital number, since it uses as much as digits as its factorization.

1020302312021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106280022.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1020302312021 its reverse (1202132030201), we get a palindrome (2222434342222).

The spelling of 1020302312021 in words is "one trillion, twenty billion, three hundred two million, three hundred twelve thousand, twenty-one".