102002212111221 has 32 divisors (see below), whose sum is σ = 154834008134400. Its totient is φ = 66328372316160.

The previous prime is 102002212111187. The next prime is 102002212111243. The reversal of 102002212111221 is 122111212200201.

102002212111221 is a `hidden beast` number, since 1 + 0 + 200 + 221 + 21 + 1 + 1 + 221 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-102002212111221 is a prime.

It is a super-2 number, since 2×102002212111221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102002212111194 and 102002212111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102002212111271) 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, 5032236 + ... + 15143573.

It is an arithmetic number, because the mean of its divisors is an integer number (4838562754200).

Almost surely, 2^{102002212111221} is an apocalyptic number.

It is an amenable number.

102002212111221 is a deficient number, since it is larger than the sum of its proper divisors (52831796023179).

102002212111221 is a wasteful number, since it uses less digits than its factorization.

102002212111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20180426 (or 20180420 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 102002212111221 its reverse (122111212200201), we get a palindrome (224113424311422).

The spelling of 102002212111221 in words is "one hundred two trillion, two billion, two hundred twelve million, one hundred eleven thousand, two hundred twenty-one".