1002020021121 has 8 divisors (see below), whose sum is σ = 1526887651264. Its totient is φ = 572582869200.

The previous prime is 1002020021083. The next prime is 1002020021143. The reversal of 1002020021121 is 1211200202001.

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

It is not a de Polignac number, because 1002020021121 - 2¹⁴ = 1002020004737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002020021097 and 1002020021106.

It is not an unprimeable number, because it can be changed into a prime (1002020021021) 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, 23857619530 + ... + 23857619571.

It is an arithmetic number, because the mean of its divisors is an integer number (190860956408).

Almost surely, 2^{1002020021121} is an apocalyptic number.

It is an amenable number.

1002020021121 is a deficient number, since it is larger than the sum of its proper divisors (524867630143).

1002020021121 is an equidigital number, since it uses as much as digits as its factorization.

1002020021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47715239111.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1002020021121 its reverse (1211200202001), we get a palindrome (2213220223122).

The spelling of 1002020021121 in words is "one trillion, two billion, twenty million, twenty-one thousand, one hundred twenty-one".