12121100011 has 16 divisors (see below), whose sum is σ = 12999542688. Its totient is φ = 11261952000.

The previous prime is 12121100009. The next prime is 12121100023. The reversal of 12121100011 is 11000112121.

It is a cyclic number.

It is not a de Polignac number, because 12121100011 - 2¹ = 12121100009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121100041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415711 + ... + 443911.

It is an arithmetic number, because the mean of its divisors is an integer number (812471418).

Almost surely, 2^12121100011 is an apocalyptic number.

12121100011 is a deficient number, since it is larger than the sum of its proper divisors (878442677).

12121100011 is a wasteful number, since it uses less digits than its factorization.

12121100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28542.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12121100011 its reverse (11000112121), we get a palindrome (23121212132).

The spelling of 12121100011 in words is "twelve billion, one hundred twenty-one million, one hundred thousand, eleven".