1020002220021 has 16 divisors (see below), whose sum is σ = 1379328099840. Its totient is φ = 670341273840.

The previous prime is 1020002219993. The next prime is 1020002220043. The reversal of 1020002220021 is 1200222000201.

It is not a de Polignac number, because 1020002220021 - 2³⁷ = 882563266549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020002219979 and 1020002220006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020002240021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1459326 + ... + 2041968.

It is an arithmetic number, because the mean of its divisors is an integer number (86208006240).

Almost surely, 2^{1020002220021} is an apocalyptic number.

It is an amenable number.

1020002220021 is a deficient number, since it is larger than the sum of its proper divisors (359325879819).

1020002220021 is an equidigital number, since it uses as much as digits as its factorization.

1020002220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590936.

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

Adding to 1020002220021 its reverse (1200222000201), we get a palindrome (2220224220222).

The spelling of 1020002220021 in words is "one trillion, twenty billion, two million, two hundred twenty thousand, twenty-one".