10101201221221 has 4 divisors (see below), whose sum is σ = 11019492241344. Its totient is φ = 9182910201100.

The previous prime is 10101201221197. The next prime is 10101201221231. The reversal of 10101201221221 is 12212210210101.

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 10101201221221 - 2¹¹ = 10101201219173 is a prime.

It is a super-2 number, since 2×10101201221221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10101201221195 and 10101201221204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101201221231) 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, 459145510045 + ... + 459145510066.

It is an arithmetic number, because the mean of its divisors is an integer number (2754873060336).

Almost surely, 2^{10101201221221} is an apocalyptic number.

10101201221221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10101201221221 is a deficient number, since it is larger than the sum of its proper divisors (918291020123).

10101201221221 is an equidigital number, since it uses as much as digits as its factorization.

10101201221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918291020122.

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

Adding to 10101201221221 its reverse (12212210210101), we get a palindrome (22313411431322).

The spelling of 10101201221221 in words is "ten trillion, one hundred one billion, two hundred one million, two hundred twenty-one thousand, two hundred twenty-one".