102102020101221 has 32 divisors (see below), whose sum is σ = 158548083333120. Its totient is φ = 57232887626304.

The previous prime is 102102020101199. The next prime is 102102020101253. The reversal of 102102020101221 is 122101020201201.

It is not a de Polignac number, because 102102020101221 - 2⁹ = 102102020100709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102102020101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102102020103221) 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, 2053561 + ... + 14436798.

It is an arithmetic number, because the mean of its divisors is an integer number (4954627604160).

Almost surely, 2^{102102020101221} is an apocalyptic number.

It is an amenable number.

102102020101221 is a deficient number, since it is larger than the sum of its proper divisors (56446063231899).

102102020101221 is a wasteful number, since it uses less digits than its factorization.

102102020101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16495985.

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

Adding to 102102020101221 its reverse (122101020201201), we get a palindrome (224203040302422).

The spelling of 102102020101221 in words is "one hundred two trillion, one hundred two billion, twenty million, one hundred one thousand, two hundred twenty-one".