21222111022001 has 16 divisors (see below), whose sum is σ = 21413612556288. Its totient is φ = 21031471032000.

The previous prime is 21222111021973. The next prime is 21222111022003. The reversal of 21222111022001 is 10022011122212.

It is a cyclic number.

It is not a de Polignac number, because 21222111022001 - 2¹⁰ = 21222111020977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222111022003) 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, 378309911 + ... + 378366003.

It is an arithmetic number, because the mean of its divisors is an integer number (1338350784768).

Almost surely, 2^{21222111022001} is an apocalyptic number.

It is an amenable number.

21222111022001 is a deficient number, since it is larger than the sum of its proper divisors (191501534287).

21222111022001 is a wasteful number, since it uses less digits than its factorization.

21222111022001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63712.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21222111022001 its reverse (10022011122212), we get a palindrome (31244122144213).

The spelling of 21222111022001 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred eleven million, twenty-two thousand, one".