21220102222001 has 8 divisors (see below), whose sum is σ = 22370990780544. Its totient is φ = 20088236615040.

The previous prime is 21220102221977. The next prime is 21220102222021. The reversal of 21220102222001 is 10022220102212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21220102222001 - 2¹⁸ = 21220101959857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220102222021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4755735605 + ... + 4755740066.

It is an arithmetic number, because the mean of its divisors is an integer number (2796373847568).

Almost surely, 2^{21220102222001} is an apocalyptic number.

It is an amenable number.

21220102222001 is a deficient number, since it is larger than the sum of its proper divisors (1150888558543).

21220102222001 is an equidigital number, since it uses as much as digits as its factorization.

21220102222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9511475791.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21220102222001 its reverse (10022220102212), we get a palindrome (31242322324213).

The spelling of 21220102222001 in words is "twenty-one trillion, two hundred twenty billion, one hundred two million, two hundred twenty-two thousand, one".