1020022020021 has 16 divisors (see below), whose sum is σ = 1373637760128. Its totient is φ = 673211880000.

The previous prime is 1020022019977. The next prime is 1020022020047. The reversal of 1020022020021 is 1200202200201.

It is not a de Polignac number, because 1020022020021 - 2⁷ = 1020022019893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020022019979 and 1020022020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020022020071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2830000 + ... + 3170006.

It is an arithmetic number, because the mean of its divisors is an integer number (85852360008).

Almost surely, 2^{1020022020021} is an apocalyptic number.

It is an amenable number.

1020022020021 is a deficient number, since it is larger than the sum of its proper divisors (353615740107).

1020022020021 is a wasteful number, since it uses less digits than its factorization.

1020022020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350012.

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

Adding to 1020022020021 its reverse (1200202200201), we get a palindrome (2220224220222).

The spelling of 1020022020021 in words is "one trillion, twenty billion, twenty-two million, twenty thousand, twenty-one".