1001202021101 has 4 divisors (see below), whose sum is σ = 1010062216092. Its totient is φ = 992341826112.

The previous prime is 1001202021077. The next prime is 1001202021103. The reversal of 1001202021101 is 1011202021001.

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 235137708100 + 766064313001 = 484910^2 + 875251^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001202021101 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 (1001202021103) 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, 4430097326 + ... + 4430097551.

It is an arithmetic number, because the mean of its divisors is an integer number (252515554023).

Almost surely, 2^{1001202021101} is an apocalyptic number.

It is an amenable number.

1001202021101 is a deficient number, since it is larger than the sum of its proper divisors (8860194991).

1001202021101 is an equidigital number, since it uses as much as digits as its factorization.

1001202021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8860194990.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1001202021101 its reverse (1011202021001), we get a palindrome (2012404042102).

The spelling of 1001202021101 in words is "one trillion, one billion, two hundred two million, twenty-one thousand, one hundred one".