102101212221 has 32 divisors (see below), whose sum is σ = 143525437440. Its totient is φ = 64480536000.

The previous prime is 102101212219. The next prime is 102101212261. The reversal of 102101212221 is 122212101201.

It is not a de Polignac number, because 102101212221 - 2¹ = 102101212219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102101212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102101212201) 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, 780696 + ... + 902046.

It is an arithmetic number, because the mean of its divisors is an integer number (4485169920).

Almost surely, 2^102101212221 is an apocalyptic number.

It is an amenable number.

102101212221 is a deficient number, since it is larger than the sum of its proper divisors (41424225219).

102101212221 is a wasteful number, since it uses less digits than its factorization.

102101212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121577.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102101212221 its reverse (122212101201), we get a palindrome (224313313422).

The spelling of 102101212221 in words is "one hundred two billion, one hundred one million, two hundred twelve thousand, two hundred twenty-one".