11002012121 has 4 divisors (see below), whose sum is σ = 11257872912. Its totient is φ = 10746151332.

The previous prime is 11002012117. The next prime is 11002012163. The reversal of 11002012121 is 12121020011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11002012121 - 2² = 11002012117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11002012181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127930331 + ... + 127930416.

It is an arithmetic number, because the mean of its divisors is an integer number (2814468228).

Almost surely, 2^11002012121 is an apocalyptic number.

It is an amenable number.

11002012121 is a deficient number, since it is larger than the sum of its proper divisors (255860791).

11002012121 is an equidigital number, since it uses as much as digits as its factorization.

11002012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255860790.

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

Adding to 11002012121 its reverse (12121020011), we get a palindrome (23123032132).

The spelling of 11002012121 in words is "eleven billion, two million, twelve thousand, one hundred twenty-one".