100111202101221 has 16 divisors (see below), whose sum is σ = 135708600552000. Its totient is φ = 65627927925120.

The previous prime is 100111202101217. The next prime is 100111202101231. The reversal of 100111202101221 is 122101202111001.

It is a happy number.

It is not a de Polignac number, because 100111202101221 - 2² = 100111202101217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100111202101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100111202101231) 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, 77532840 + ... + 78813473.

It is an arithmetic number, because the mean of its divisors is an integer number (8481787534500).

Almost surely, 2^{100111202101221} is an apocalyptic number.

It is an amenable number.

100111202101221 is a deficient number, since it is larger than the sum of its proper divisors (35597398450779).

100111202101221 is a wasteful number, since it uses less digits than its factorization.

100111202101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156349876.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 100111202101221 its reverse (122101202111001), we get a palindrome (222212404212222).

The spelling of 100111202101221 in words is "one hundred trillion, one hundred eleven billion, two hundred two million, one hundred one thousand, two hundred twenty-one".