102221201121221 has 32 divisors (see below), whose sum is σ = 128049968471040. Its totient is φ = 79449182781696.

The previous prime is 102221201121209. The next prime is 102221201121223. The reversal of 102221201121221 is 122121102122201.

It is not a de Polignac number, because 102221201121221 - 2¹⁰ = 102221201120197 is a prime.

It is a super-2 number, since 2×102221201121221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102221201121193 and 102221201121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102221201121223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34672886 + ... + 37505351.

It is an arithmetic number, because the mean of its divisors is an integer number (4001561514720).

Almost surely, 2^{102221201121221} is an apocalyptic number.

It is an amenable number.

102221201121221 is a deficient number, since it is larger than the sum of its proper divisors (25828767349819).

102221201121221 is a wasteful number, since it uses less digits than its factorization.

102221201121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72178533.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 102221201121221 its reverse (122121102122201), we get a palindrome (224342303243422).

The spelling of 102221201121221 in words is "one hundred two trillion, two hundred twenty-one billion, two hundred one million, one hundred twenty-one thousand, two hundred twenty-one".