102021221201 has 12 divisors (see below), whose sum is σ = 103341425460. Its totient is φ = 100708005600.

The previous prime is 102021221171. The next prime is 102021221213. The reversal of 102021221201 is 102122120201.

It can be written as a sum of positive squares in 2 ways, for example, as 93881572801 + 8139648400 = 306401^2 + 90220^2 .

It is not a de Polignac number, because 102021221201 - 2¹⁰ = 102021220177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102021221251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12157115 + ... + 12165503.

It is an arithmetic number, because the mean of its divisors is an integer number (8611785455).

Almost surely, 2^102021221201 is an apocalyptic number.

It is an amenable number.

102021221201 is a deficient number, since it is larger than the sum of its proper divisors (1320204259).

102021221201 is an frugal number, since it uses more digits than its factorization.

102021221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9184 (or 8837 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102021221201 its reverse (102122120201), we get a palindrome (204143341402).

The spelling of 102021221201 in words is "one hundred two billion, twenty-one million, two hundred twenty-one thousand, two hundred one".