21111022220101 has 16 divisors (see below), whose sum is σ = 23051710693440. Its totient is φ = 19173924161280.

The previous prime is 21111022220083. The next prime is 21111022220191. The reversal of 21111022220101 is 10102222011112.

It is a cyclic number.

It is not a de Polignac number, because 21111022220101 - 2¹⁷ = 21111022089029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111022220191) 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, 68018470 + ... + 68328136.

It is an arithmetic number, because the mean of its divisors is an integer number (1440731918340).

Almost surely, 2^{21111022220101} is an apocalyptic number.

It is an amenable number.

21111022220101 is a deficient number, since it is larger than the sum of its proper divisors (1940688473339).

21111022220101 is a wasteful number, since it uses less digits than its factorization.

21111022220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315444.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21111022220101 its reverse (10102222011112), we get a palindrome (31213244231213).

The spelling of 21111022220101 in words is "twenty-one trillion, one hundred eleven billion, twenty-two million, two hundred twenty thousand, one hundred one".