202012220202109 has 2 divisors, whose sum is σ = 202012220202110. Its totient is φ = 202012220202108.

The previous prime is 202012220202083. The next prime is 202012220202151. The reversal of 202012220202109 is 901202022210202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180447369624900 + 21564850577209 = 13433070^2 + 4643797^2 .

It is a cyclic number.

It is not a de Polignac number, because 202012220202109 - 2⁵ = 202012220202077 is a prime.

It is a super-2 number, since 2×202012220202109² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202012220202809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101006110101054 + 101006110101055.

It is an arithmetic number, because the mean of its divisors is an integer number (101006110101055).

Almost surely, 2^{202012220202109} is an apocalyptic number.

It is an amenable number.

202012220202109 is a deficient number, since it is larger than the sum of its proper divisors (1).

202012220202109 is an equidigital number, since it uses as much as digits as its factorization.

202012220202109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 202012220202109 in words is "two hundred two trillion, twelve billion, two hundred twenty million, two hundred two thousand, one hundred nine".