10220001021221 has 4 divisors (see below), whose sum is σ = 10240815687744. Its totient is φ = 10199186354700.

The previous prime is 10220001021199. The next prime is 10220001021227. The reversal of 10220001021221 is 12212010002201.

10220001021221 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 a cyclic number.

It is not a de Polignac number, because 10220001021221 - 2²² = 10219996826917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10220001021196 and 10220001021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10220001021227) 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, 10407332525 + ... + 10407333506.

It is an arithmetic number, because the mean of its divisors is an integer number (2560203921936).

Almost surely, 2^{10220001021221} is an apocalyptic number.

It is an amenable number.

10220001021221 is a deficient number, since it is larger than the sum of its proper divisors (20814666523).

10220001021221 is an equidigital number, since it uses as much as digits as its factorization.

10220001021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20814666522.

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

Adding to 10220001021221 its reverse (12212010002201), we get a palindrome (22432011023422).

The spelling of 10220001021221 in words is "ten trillion, two hundred twenty billion, one million, twenty-one thousand, two hundred twenty-one".