102011011100221 has 4 divisors (see below), whose sum is σ = 102011093159932. Its totient is φ = 102010929040512.

The previous prime is 102011011100177. The next prime is 102011011100231. The reversal of 102011011100221 is 122001110110201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32261604804900 + 69749406295321 = 5679930^2 + 8351611^2 .

It is a cyclic number.

It is not a de Polignac number, because 102011011100221 - 2²³ = 102011002711613 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 (102011011100231) 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, 39136020 + ... + 41661133.

It is an arithmetic number, because the mean of its divisors is an integer number (25502773289983).

Almost surely, 2^{102011011100221} is an apocalyptic number.

It is an amenable number.

102011011100221 is a deficient number, since it is larger than the sum of its proper divisors (82059711).

102011011100221 is an equidigital number, since it uses as much as digits as its factorization.

102011011100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82059710.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 102011011100221 its reverse (122001110110201), we get a palindrome (224012121210422).

The spelling of 102011011100221 in words is "one hundred two trillion, eleven billion, eleven million, one hundred thousand, two hundred twenty-one".