221102100121 has 16 divisors (see below), whose sum is σ = 263396960640. Its totient is φ = 181584224640.

The previous prime is 221102100091. The next prime is 221102100127. The reversal of 221102100121 is 121001201122.

It is not a de Polignac number, because 221102100121 - 2¹³ = 221102091929 is a prime.

It is a super-2 number, since 2×221102100121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221102100127) 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, 4130556 + ... + 4183741.

It is an arithmetic number, because the mean of its divisors is an integer number (16462310040).

Almost surely, 2^221102100121 is an apocalyptic number.

It is an amenable number.

221102100121 is a deficient number, since it is larger than the sum of its proper divisors (42294860519).

221102100121 is a wasteful number, since it uses less digits than its factorization.

221102100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8314464.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221102100121 its reverse (121001201122), we get a palindrome (342103301243).

The spelling of 221102100121 in words is "two hundred twenty-one billion, one hundred two million, one hundred thousand, one hundred twenty-one".