102021211221101 has 4 divisors (see below), whose sum is σ = 102610929205212. Its totient is φ = 101431493236992.

The previous prime is 102021211221071. The next prime is 102021211221103. The reversal of 102021211221101 is 101122112120201.

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 53551279879876 + 48469931341225 = 7317874^2 + 6962035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102021211221101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 102021211221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021211221103) 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, 294858991796 + ... + 294858992141.

It is an arithmetic number, because the mean of its divisors is an integer number (25652732301303).

Almost surely, 2^{102021211221101} is an apocalyptic number.

It is an amenable number.

102021211221101 is a deficient number, since it is larger than the sum of its proper divisors (589717984111).

102021211221101 is an equidigital number, since it uses as much as digits as its factorization.

102021211221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589717984110.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 102021211221101 its reverse (101122112120201), we get a palindrome (203143323341302).

The spelling of 102021211221101 in words is "one hundred two trillion, twenty-one billion, two hundred eleven million, two hundred twenty-one thousand, one hundred one".