11010002121 has 24 divisors (see below), whose sum is σ = 16171089480. Its totient is φ = 7217337600.

The previous prime is 11010002039. The next prime is 11010002141. The reversal of 11010002121 is 12120001011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 103124025 + 10906878096 = 10155^2 + 104436^2 .

It is not a de Polignac number, because 11010002121 - 2¹⁴ = 11009985737 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11010002141) 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, 107011 + ... + 182951.

It is an arithmetic number, because the mean of its divisors is an integer number (673795395).

Almost surely, 2^11010002121 is an apocalyptic number.

It is an amenable number.

11010002121 is a deficient number, since it is larger than the sum of its proper divisors (5161087359).

11010002121 is a wasteful number, since it uses less digits than its factorization.

11010002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76217 (or 76214 counting only the distinct ones).

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

Adding to 11010002121 its reverse (12120001011), we get a palindrome (23130003132).

The spelling of 11010002121 in words is "eleven billion, ten million, two thousand, one hundred twenty-one".