1020022002021 has 12 divisors (see below), whose sum is σ = 1494908278976. Its totient is φ = 618195152520.

The previous prime is 1020022002017. The next prime is 1020022002037. The reversal of 1020022002021 is 1202002200201.

It is not a de Polignac number, because 1020022002021 - 2² = 1020022002017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020022001988 and 1020022002006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020022002011) 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, 1404988621 + ... + 1404989346.

Almost surely, 2^{1020022002021} is an apocalyptic number.

1020022002021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1020022002021 is a deficient number, since it is larger than the sum of its proper divisors (474886276955).

1020022002021 is a wasteful number, since it uses less digits than its factorization.

1020022002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2809977992 (or 2809977981 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1020022002021 its reverse (1202002200201), we get a palindrome (2222024202222).

The spelling of 1020022002021 in words is "one trillion, twenty billion, twenty-two million, two thousand, twenty-one".