11212121000001 has 16 divisors (see below), whose sum is σ = 16278941563200. Its totient is φ = 6837155454528.

The previous prime is 11212120999999. The next prime is 11212121000071. The reversal of 11212121000001 is 10000012121211.

It is not a de Polignac number, because 11212121000001 - 2¹ = 11212120999999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11212121000071) 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, 3391444506 + ... + 3391447811.

It is an arithmetic number, because the mean of its divisors is an integer number (1017433847700).

Almost surely, 2^{11212121000001} is an apocalyptic number.

It is an amenable number.

11212121000001 is a deficient number, since it is larger than the sum of its proper divisors (5066820563199).

11212121000001 is a wasteful number, since it uses less digits than its factorization.

11212121000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6782892368.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11212121000001 its reverse (10000012121211), we get a palindrome (21212133121212).

The spelling of 11212121000001 in words is "eleven trillion, two hundred twelve billion, one hundred twenty-one million, one", and thus it is an aban number.