11012002121 has 6 divisors (see below), whose sum is σ = 11622085722. Its totient is φ = 10432422720.

The previous prime is 11012002103. The next prime is 11012002153. The reversal of 11012002121 is 12120021011.

It can be written as a sum of positive squares in only one way, i.e., 10900404025 + 111598096 = 104405^2 + 10564^2 .

It is not a de Polignac number, because 11012002121 - 2²² = 11007807817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11012002321) 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, 15251720 + ... + 15252441.

It is an arithmetic number, because the mean of its divisors is an integer number (1937014287).

Almost surely, 2^11012002121 is an apocalyptic number.

It is an amenable number.

11012002121 is a deficient number, since it is larger than the sum of its proper divisors (610083601).

11012002121 is an equidigital number, since it uses as much as digits as its factorization.

11012002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30504199 (or 30504180 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11012002121 its reverse (12120021011), we get a palindrome (23132023132).

The spelling of 11012002121 in words is "eleven billion, twelve million, two thousand, one hundred twenty-one".