10202002110021 has 4 divisors (see below), whose sum is σ = 13602669480032. Its totient is φ = 6801334740012.

The previous prime is 10202002110019. The next prime is 10202002110023. The reversal of 10202002110021 is 12001120020201.

10202002110021 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (10202002110019) and next prime (10202002110023).

It is not a de Polignac number, because 10202002110021 - 2¹ = 10202002110019 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10202002109979 and 10202002110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202002110023) 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, 1700333685001 + ... + 1700333685006.

It is an arithmetic number, because the mean of its divisors is an integer number (3400667370008).

Almost surely, 2^{10202002110021} is an apocalyptic number.

It is an amenable number.

10202002110021 is a deficient number, since it is larger than the sum of its proper divisors (3400667370011).

10202002110021 is an equidigital number, since it uses as much as digits as its factorization.

10202002110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3400667370010.

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

Adding to 10202002110021 its reverse (12001120020201), we get a palindrome (22203122130222).

The spelling of 10202002110021 in words is "ten trillion, two hundred two billion, two million, one hundred ten thousand, twenty-one".