1002220121021 has 8 divisors (see below), whose sum is σ = 1145842389120. Its totient is φ = 858709844208.

The previous prime is 1002220121017. The next prime is 1002220121027. The reversal of 1002220121021 is 1201210222001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1002220121021 - 2² = 1002220121017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002220120987 and 1002220121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002220121027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27978641 + ... + 28014438.

It is an arithmetic number, because the mean of its divisors is an integer number (143230298640).

Almost surely, 2^{1002220121021} is an apocalyptic number.

It is an amenable number.

1002220121021 is a deficient number, since it is larger than the sum of its proper divisors (143622268099).

1002220121021 is an equidigital number, since it uses as much as digits as its factorization.

1002220121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55995643.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1002220121021 its reverse (1201210222001), we get a palindrome (2203430343022).

The spelling of 1002220121021 in words is "one trillion, two billion, two hundred twenty million, one hundred twenty-one thousand, twenty-one".