1002000021101 has 4 divisors (see below), whose sum is σ = 1002141573600.
Its totient is φ = 1001858468604.
The previous prime is 1002000021097. The next prime is 1002000021103. The reversal of 1002000021101 is 1011200002001.
Adding to 1002000021101 its reverse (1011200002001), we get a palindrome (2013200023102).
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 cyclic number.
It is not a de Polignac number, because 1002000021101 - 22 = 1002000021097 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 (1002000021103) 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, 70765631 + ... + 70779788.
It is an arithmetic number, because the mean of its divisors is an integer number (250535393400).
Almost surely, 21002000021101 is an apocalyptic number.
It is an amenable number.
1002000021101 is a deficient number, since it is larger than the sum of its proper divisors (141552499).
1002000021101 is an equidigital number, since it uses as much as digits as its factorization.
1002000021101 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 141552498.
The product of its (nonzero) digits is 4, while the sum is 8.
The spelling of 1002000021101 in words is "one trillion, two billion, twenty-one thousand, one hundred one".