101020122209 has 4 divisors (see below), whose sum is σ = 101036273604. Its totient is φ = 101003970816.

The previous prime is 101020122187. The next prime is 101020122253. The reversal of 101020122209 is 902221020101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 902221020101 = 646273 ⋅1396037.

It can be written as a sum of positive squares in 2 ways, for example, as 83652835984 + 17367286225 = 289228^2 + 131785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101020122209 is a prime.

It is a super-2 number, since 2×101020122209² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101020125209) 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 3 ways as a sum of consecutive naturals, for example, 8066312 + ... + 8078825.

It is an arithmetic number, because the mean of its divisors is an integer number (25259068401).

Almost surely, 2^101020122209 is an apocalyptic number.

It is an amenable number.

101020122209 is a deficient number, since it is larger than the sum of its proper divisors (16151395).

101020122209 is an equidigital number, since it uses as much as digits as its factorization.

101020122209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16151394.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 101020122209 in words is "one hundred one billion, twenty million, one hundred twenty-two thousand, two hundred nine".