1021202101109 has 4 divisors (see below), whose sum is σ = 1026907140960. Its totient is φ = 1015497061260.

The previous prime is 1021202101103. The next prime is 1021202101177. The reversal of 1021202101109 is 9011012021201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-1021202101109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021202101103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2852519657 + ... + 2852520014.

It is an arithmetic number, because the mean of its divisors is an integer number (256726785240).

Almost surely, 2^{1021202101109} is an apocalyptic number.

It is an amenable number.

1021202101109 is a deficient number, since it is larger than the sum of its proper divisors (5705039851).

1021202101109 is an equidigital number, since it uses as much as digits as its factorization.

1021202101109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5705039850.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 1021202101109 in words is "one trillion, twenty-one billion, two hundred two million, one hundred one thousand, one hundred nine".