1000010120121 has 12 divisors (see below), whose sum is σ = 1529427242772. Its totient is φ = 627457330176.

The previous prime is 1000010120119. The next prime is 1000010120159. The reversal of 1000010120121 is 1210210100001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 626731888896 + 373278231225 = 791664^2 + 610965^2 .

It is not a de Polignac number, because 1000010120121 - 2¹ = 1000010120119 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1000010120321) 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, 3268006776 + ... + 3268007081.

It is an arithmetic number, because the mean of its divisors is an integer number (127452270231).

Almost surely, 2^{1000010120121} is an apocalyptic number.

It is an amenable number.

1000010120121 is a deficient number, since it is larger than the sum of its proper divisors (529417122651).

1000010120121 is a wasteful number, since it uses less digits than its factorization.

1000010120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6536013880 (or 6536013877 counting only the distinct ones).

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

Adding to 1000010120121 its reverse (1210210100001), we get a palindrome (2210220220122).

The spelling of 1000010120121 in words is "one trillion, ten million, one hundred twenty thousand, one hundred twenty-one".