11212121020001 has 16 divisors (see below), whose sum is σ = 12494908585728. Its totient is φ = 9973363996800.

The previous prime is 11212121019959. The next prime is 11212121020031. The reversal of 11212121020001 is 10002012121211.

It is a cyclic number.

It is not a de Polignac number, because 11212121020001 - 2⁶ = 11212121019937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11212121020031) 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, 847310 + ... + 4810631.

It is an arithmetic number, because the mean of its divisors is an integer number (780931786608).

Almost surely, 2^{11212121020001} is an apocalyptic number.

11212121020001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11212121020001 is a deficient number, since it is larger than the sum of its proper divisors (1282787565727).

11212121020001 is a wasteful number, since it uses less digits than its factorization.

11212121020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5661832.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11212121020001 its reverse (10002012121211), we get a palindrome (21214133141212).

It can be divided in two parts, 112121210 and 20001, that added together give a palindrome (112141211).

The spelling of 11212121020001 in words is "eleven trillion, two hundred twelve billion, one hundred twenty-one million, twenty thousand, one".