10221012101221 has 4 divisors (see below), whose sum is σ = 10222017819552. Its totient is φ = 10220006382892.

The previous prime is 10221012101197. The next prime is 10221012101231. The reversal of 10221012101221 is 12210121012201.

10221012101221 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 10221012101221 - 2¹⁵ = 10221012068453 is a prime.

It is a super-3 number, since 3×10221012101221³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10221012101195 and 10221012101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221012101231) 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, 502843921 + ... + 502864246.

It is an arithmetic number, because the mean of its divisors is an integer number (2555504454888).

Almost surely, 2^{10221012101221} is an apocalyptic number.

It is an amenable number.

10221012101221 is a deficient number, since it is larger than the sum of its proper divisors (1005718331).

10221012101221 is a wasteful number, since it uses less digits than its factorization.

10221012101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005718330.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10221012101221 its reverse (12210121012201), we get a palindrome (22431133113422).

The spelling of 10221012101221 in words is "ten trillion, two hundred twenty-one billion, twelve million, one hundred one thousand, two hundred twenty-one".