100221021111221 has 16 divisors (see below), whose sum is σ = 106147995692544. Its totient is φ = 94297563596544.

The previous prime is 100221021111191. The next prime is 100221021111313. The reversal of 100221021111221 is 122111120122001.

It is a cyclic number.

It is not a de Polignac number, because 100221021111221 - 2¹⁸ = 100221020849077 is a prime.

It is a super-2 number, since 2×100221021111221² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100221021111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100221021101221) 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, 1022958980 + ... + 1023056946.

It is an arithmetic number, because the mean of its divisors is an integer number (6634249730784).

Almost surely, 2^{100221021111221} is an apocalyptic number.

It is an amenable number.

100221021111221 is a deficient number, since it is larger than the sum of its proper divisors (5926974581323).

100221021111221 is a wasteful number, since it uses less digits than its factorization.

100221021111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115300.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 100221021111221 its reverse (122111120122001), we get a palindrome (222332141233222).

The spelling of 100221021111221 in words is "one hundred trillion, two hundred twenty-one billion, twenty-one million, one hundred eleven thousand, two hundred twenty-one".