1020212202109 has 4 divisors (see below), whose sum is σ = 1080224684604. Its totient is φ = 960199719616.

The previous prime is 1020212202089. The next prime is 1020212202127. The reversal of 1020212202109 is 9012022120201.

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 641605806009 + 378606396100 = 801003^2 + 615310^2 .

It is not a de Polignac number, because 1020212202109 - 2²⁹ = 1019675331197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020212202109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020212202199) 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, 30006241222 + ... + 30006241255.

It is an arithmetic number, because the mean of its divisors is an integer number (270056171151).

Almost surely, 2^{1020212202109} is an apocalyptic number.

It is an amenable number.

1020212202109 is a deficient number, since it is larger than the sum of its proper divisors (60012482495).

1020212202109 is an equidigital number, since it uses as much as digits as its factorization.

1020212202109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60012482494.

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

The spelling of 1020212202109 in words is "one trillion, twenty billion, two hundred twelve million, two hundred two thousand, one hundred nine".