21222022101013 has 4 divisors (see below), whose sum is σ = 21222738099148. Its totient is φ = 21221306102880.

The previous prime is 21222022101011. The next prime is 21222022101019. The reversal of 21222022101013 is 31010122022212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19592370710929 + 1629651390084 = 4426327^2 + 1276578^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222022101013 - 2¹ = 21222022101011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222022101011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357954606 + ... + 358013887.

It is an arithmetic number, because the mean of its divisors is an integer number (5305684524787).

Almost surely, 2^{21222022101013} is an apocalyptic number.

It is an amenable number.

21222022101013 is a deficient number, since it is larger than the sum of its proper divisors (715998135).

21222022101013 is an equidigital number, since it uses as much as digits as its factorization.

21222022101013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715998134.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21222022101013 its reverse (31010122022212), we get a palindrome (52232144123225).

The spelling of 21222022101013 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-two million, one hundred one thousand, thirteen".