1001101202021 has 4 divisors (see below), whose sum is σ = 1001135632044. Its totient is φ = 1001066772000.

The previous prime is 1001101202011. The next prime is 1001101202027. The reversal of 1001101202021 is 1202021011001.

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 361789017121 + 639312184900 = 601489^2 + 799570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001101202021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001101201993 and 1001101202011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001101202027) 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, 17171360 + ... + 17229561.

It is an arithmetic number, because the mean of its divisors is an integer number (250283908011).

Almost surely, 2^{1001101202021} is an apocalyptic number.

It is an amenable number.

1001101202021 is a deficient number, since it is larger than the sum of its proper divisors (34430023).

1001101202021 is an equidigital number, since it uses as much as digits as its factorization.

1001101202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34430022.

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

Adding to 1001101202021 its reverse (1202021011001), we get a palindrome (2203122213022).

The spelling of 1001101202021 in words is "one trillion, one billion, one hundred one million, two hundred two thousand, twenty-one".