102212212101221 has 4 divisors (see below), whose sum is σ = 103167466420032. Its totient is φ = 101256957782412.

The previous prime is 102212212101199. The next prime is 102212212101317. The reversal of 102212212101221 is 122101212212201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102212212101221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102212212101193 and 102212212101202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102212212101421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477627159245 + ... + 477627159458.

It is an arithmetic number, because the mean of its divisors is an integer number (25791866605008).

Almost surely, 2^{102212212101221} is an apocalyptic number.

It is an amenable number.

102212212101221 is a deficient number, since it is larger than the sum of its proper divisors (955254318811).

102212212101221 is an equidigital number, since it uses as much as digits as its factorization.

102212212101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955254318810.

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

Adding to 102212212101221 its reverse (122101212212201), we get a palindrome (224313424313422).

The spelling of 102212212101221 in words is "one hundred two trillion, two hundred twelve billion, two hundred twelve million, one hundred one thousand, two hundred twenty-one".