102101001212221 has 4 divisors (see below), whose sum is σ = 111382910413344. Its totient is φ = 92819092011100.

The previous prime is 102101001212183. The next prime is 102101001212293. The reversal of 102101001212221 is 122212100101201.

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 not a de Polignac number, because 102101001212221 - 2¹⁵ = 102101001179453 is a prime.

It is a super-2 number, since 2×102101001212221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102101001212195 and 102101001212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102101001212921) 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, 4640954600545 + ... + 4640954600566.

It is an arithmetic number, because the mean of its divisors is an integer number (27845727603336).

Almost surely, 2^{102101001212221} is an apocalyptic number.

102101001212221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102101001212221 is a deficient number, since it is larger than the sum of its proper divisors (9281909201123).

102101001212221 is an equidigital number, since it uses as much as digits as its factorization.

102101001212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9281909201122.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102101001212221 its reverse (122212100101201), we get a palindrome (224313101313422).

The spelling of 102101001212221 in words is "one hundred two trillion, one hundred one billion, one million, two hundred twelve thousand, two hundred twenty-one".