102101012221 has 8 divisors (see below), whose sum is σ = 110306234360. Its totient is φ = 93945975552.

The previous prime is 102101012203. The next prime is 102101012239. The reversal of 102101012221 is 122210101201.

It is an interprime number because it is at equal distance from previous prime (102101012203) and next prime (102101012239).

It can be written as a sum of positive squares in 4 ways, for example, as 7397720100 + 94703292121 = 86010^2 + 307739^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102101012221 - 2¹¹ = 102101010173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102101016221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12542136 + ... + 12550273.

It is an arithmetic number, because the mean of its divisors is an integer number (13788279295).

Almost surely, 2^102101012221 is an apocalyptic number.

It is an amenable number.

102101012221 is a deficient number, since it is larger than the sum of its proper divisors (8205222139).

102101012221 is a wasteful number, since it uses less digits than its factorization.

102101012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25092735.

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

Adding to 102101012221 its reverse (122210101201), we get a palindrome (224311113422).

The spelling of 102101012221 in words is "one hundred two billion, one hundred one million, twelve thousand, two hundred twenty-one".