1021002200101 has 4 divisors (see below), whose sum is σ = 1099540830892. Its totient is φ = 942463569312.

The previous prime is 1021002200083. The next prime is 1021002200111. The reversal of 1021002200101 is 1010022001201.

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 442298153025 + 578704047076 = 665055^2 + 760726^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021002200101 - 2¹¹ = 1021002198053 is a prime.

It is a super-2 number, since 2×1021002200101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021002200111) 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, 39269315376 + ... + 39269315401.

It is an arithmetic number, because the mean of its divisors is an integer number (274885207723).

Almost surely, 2^{1021002200101} is an apocalyptic number.

It is an amenable number.

1021002200101 is a deficient number, since it is larger than the sum of its proper divisors (78538630791).

1021002200101 is an equidigital number, since it uses as much as digits as its factorization.

1021002200101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78538630790.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1021002200101 its reverse (1010022001201), we get a palindrome (2031024201302).

The spelling of 1021002200101 in words is "one trillion, twenty-one billion, two million, two hundred thousand, one hundred one".