22021010101221 has 16 divisors (see below), whose sum is σ = 29997344966400. Its totient is φ = 14366075378688.

The previous prime is 22021010101157. The next prime is 22021010101243. The reversal of 22021010101221 is 12210101012022.

It is not a de Polignac number, because 22021010101221 - 2⁶ = 22021010101157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22021010101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021010101261) 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, 425106541 + ... + 425158338.

It is an arithmetic number, because the mean of its divisors is an integer number (1874834060400).

Almost surely, 2^{22021010101221} is an apocalyptic number.

It is an amenable number.

22021010101221 is a deficient number, since it is larger than the sum of its proper divisors (7976334865179).

22021010101221 is an equidigital number, since it uses as much as digits as its factorization.

22021010101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850265068.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22021010101221 its reverse (12210101012022), we get a palindrome (34231111113243).

The spelling of 22021010101221 in words is "twenty-two trillion, twenty-one billion, ten million, one hundred one thousand, two hundred twenty-one".