1000002121101 has 24 divisors (see below), whose sum is σ = 1450804170816. Its totient is φ = 663734859840.

The previous prime is 1000002121099. The next prime is 1000002121187. The reversal of 1000002121101 is 1011212000001.

It is a happy number.

It is not a de Polignac number, because 1000002121101 - 2¹ = 1000002121099 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000002120101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25167216 + ... + 25206918.

It is an arithmetic number, because the mean of its divisors is an integer number (60450173784).

Almost surely, 2^{1000002121101} is an apocalyptic number.

It is an amenable number.

1000002121101 is a deficient number, since it is larger than the sum of its proper divisors (450802049715).

1000002121101 is a wasteful number, since it uses less digits than its factorization.

1000002121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51953 (or 51950 counting only the distinct ones).

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

Adding to 1000002121101 its reverse (1011212000001), we get a palindrome (2011214121102).

The spelling of 1000002121101 in words is "one trillion, two million, one hundred twenty-one thousand, one hundred one".