202102221109 has 2 divisors, whose sum is σ = 202102221110. Its totient is φ = 202102221108.

The previous prime is 202102221107. The next prime is 202102221119. The reversal of 202102221109 is 901122201202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197606920900 + 4495300209 = 444530^2 + 67047^2 .

It is a cyclic number.

It is not a de Polignac number, because 202102221109 - 2¹ = 202102221107 is a prime.

It is a super-2 number, since 2×202102221109² (a number of 23 digits) contains 22 as substring.

Together with 202102221107, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 202102221109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202102221107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101051110554 + 101051110555.

It is an arithmetic number, because the mean of its divisors is an integer number (101051110555).

Almost surely, 2^202102221109 is an apocalyptic number.

It is an amenable number.

202102221109 is a deficient number, since it is larger than the sum of its proper divisors (1).

202102221109 is an equidigital number, since it uses as much as digits as its factorization.

202102221109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 202102221109 in words is "two hundred two billion, one hundred two million, two hundred twenty-one thousand, one hundred nine".