102100121221 has 8 divisors (see below), whose sum is σ = 116740319744. Its totient is φ = 87473539440.

The previous prime is 102100121209. The next prime is 102100121243. The reversal of 102100121221 is 122121001201.

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

It is a de Polignac number, because none of the positive numbers 2^k-102100121221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102100121521) 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, 3388110 + ... + 3418111.

It is an arithmetic number, because the mean of its divisors is an integer number (14592539968).

Almost surely, 2^102100121221 is an apocalyptic number.

It is an amenable number.

102100121221 is a deficient number, since it is larger than the sum of its proper divisors (14640198523).

102100121221 is an equidigital number, since it uses as much as digits as its factorization.

102100121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6808371.

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

Adding to 102100121221 its reverse (122121001201), we get a palindrome (224221122422).

The spelling of 102100121221 in words is "one hundred two billion, one hundred million, one hundred twenty-one thousand, two hundred twenty-one".