10021202001221 has 4 divisors (see below), whose sum is σ = 10021656478944. Its totient is φ = 10020747523500.

The previous prime is 10021202001179. The next prime is 10021202001229. The reversal of 10021202001221 is 12210020212001.

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 a cyclic number.

It is not a de Polignac number, because 10021202001221 - 2⁶ = 10021202001157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021202001196 and 10021202001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021202001229) 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, 227205785 + ... + 227249886.

It is an arithmetic number, because the mean of its divisors is an integer number (2505414119736).

Almost surely, 2^{10021202001221} is an apocalyptic number.

It is an amenable number.

10021202001221 is a deficient number, since it is larger than the sum of its proper divisors (454477723).

10021202001221 is an equidigital number, since it uses as much as digits as its factorization.

10021202001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454477722.

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

Adding to 10021202001221 its reverse (12210020212001), we get a palindrome (22231222213222).

The spelling of 10021202001221 in words is "ten trillion, twenty-one billion, two hundred two million, one thousand, two hundred twenty-one".