1000020211101 has 12 divisors (see below), whose sum is σ = 1483513466812. Its totient is φ = 648661758336.

The previous prime is 1000020211087. The next prime is 1000020211121. The reversal of 1000020211101 is 1011120200001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 654424371225 + 345595839876 = 808965^2 + 587874^2 .

It is not a de Polignac number, because 1000020211101 - 2⁹ = 1000020210589 is a prime.

It is a super-2 number, since 2×1000020211101² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000020211121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1501531516 + ... + 1501532181.

Almost surely, 2^{1000020211101} is an apocalyptic number.

It is an amenable number.

1000020211101 is a deficient number, since it is larger than the sum of its proper divisors (483493255711).

1000020211101 is a wasteful number, since it uses less digits than its factorization.

1000020211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003063740 (or 3003063737 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1000020211101 its reverse (1011120200001), we get a palindrome (2011140411102).

It can be divided in two parts, 1000020 and 211101, that added together give a palindrome (1211121).

The spelling of 1000020211101 in words is "one trillion, twenty million, two hundred eleven thousand, one hundred one".