1002002220021 has 16 divisors (see below), whose sum is σ = 1462607815680. Its totient is φ = 605128222320.

The previous prime is 1002002220007. The next prime is 1002002220061. The reversal of 1002002220021 is 1200222002001.

It is not a de Polignac number, because 1002002220021 - 2⁹ = 1002002219509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002002219979 and 1002002220006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002002220061) 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, 53636781 + ... + 53655458.

It is an arithmetic number, because the mean of its divisors is an integer number (91412988480).

Almost surely, 2^{1002002220021} is an apocalyptic number.

1002002220021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1002002220021 is a deficient number, since it is larger than the sum of its proper divisors (460605595659).

1002002220021 is a wasteful number, since it uses less digits than its factorization.

1002002220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107292536.

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

Adding to 1002002220021 its reverse (1200222002001), we get a palindrome (2202224222022).

The spelling of 1002002220021 in words is "one trillion, two billion, two million, two hundred twenty thousand, twenty-one".