101222221111221 has 16 divisors (see below), whose sum is σ = 155833522538624. Its totient is φ = 57244967460864.

The previous prime is 101222221111199. The next prime is 101222221111367. The reversal of 101222221111221 is 122111122222101.

101222221111221 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 101222221111221 - 2²² = 101222216916917 is a prime.

It is a super-2 number, since 2×101222221111221² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101222221119221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24845903980 + ... + 24845908053.

It is an arithmetic number, because the mean of its divisors is an integer number (9739595158664).

Almost surely, 2^{101222221111221} is an apocalyptic number.

It is an amenable number.

101222221111221 is a deficient number, since it is larger than the sum of its proper divisors (54611301427403).

101222221111221 is an equidigital number, since it uses as much as digits as its factorization.

101222221111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49691812140.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 101222221111221 its reverse (122111122222101), we get a palindrome (223333343333322).

The spelling of 101222221111221 in words is "one hundred one trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred eleven thousand, two hundred twenty-one".