11002010121 has 6 divisors (see below), whose sum is σ = 15891792410. Its totient is φ = 7334673408.

The previous prime is 11002010083. The next prime is 11002010147. The reversal of 11002010121 is 12101020011.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7477925625 + 3524084496 = 86475^2 + 59364^2 .

It is not a de Polignac number, because 11002010121 - 2²¹ = 10999912969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1222445569 = 11002010121 / (1 + 1 + 0 + 0 + 2 + 0 + 1 + 0 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11002010321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 611222776 + ... + 611222793.

Almost surely, 2^11002010121 is an apocalyptic number.

It is an amenable number.

11002010121 is a deficient number, since it is larger than the sum of its proper divisors (4889782289).

11002010121 is a wasteful number, since it uses less digits than its factorization.

11002010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222445575 (or 1222445572 counting only the distinct ones).

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

Adding to 11002010121 its reverse (12101020011), we get a palindrome (23103030132).

The spelling of 11002010121 in words is "eleven billion, two million, ten thousand, one hundred twenty-one".