10002120112021 has 4 divisors (see below), whose sum is σ = 10002160709100. Its totient is φ = 10002079514944.

The previous prime is 10002120111959. The next prime is 10002120112067. The reversal of 10002120112021 is 12021102120001.

10002120112021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3474350609521 + 6527769502500 = 1863961^2 + 2554950^2 .

It is a cyclic number.

It is not a de Polignac number, because 10002120112021 - 2¹⁷ = 10002119980949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10002120111992 and 10002120112010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10002120113021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19926706 + ... + 20422483.

It is an arithmetic number, because the mean of its divisors is an integer number (2500540177275).

Almost surely, 2^{10002120112021} is an apocalyptic number.

It is an amenable number.

10002120112021 is a deficient number, since it is larger than the sum of its proper divisors (40597079).

10002120112021 is an equidigital number, since it uses as much as digits as its factorization.

10002120112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40597078.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10002120112021 its reverse (12021102120001), we get a palindrome (22023222232022).

The spelling of 10002120112021 in words is "ten trillion, two billion, one hundred twenty million, one hundred twelve thousand, twenty-one".