21022022202122 has 8 divisors (see below), whose sum is σ = 31537119504036. Its totient is φ = 10509649034112.

The previous prime is 21022022202121. The next prime is 21022022202133. The reversal of 21022022202122 is 22120222022012.

It can be written as a sum of positive squares in 2 ways, for example, as 19853182287481 + 1168839914641 = 4455691^2 + 1081129^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21022022202094 and 21022022202103.

It is not an unprimeable number, because it can be changed into a prime (21022022202121) 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, 681014183 + ... + 681045050.

Almost surely, 2^{21022022202122} is an apocalyptic number.

21022022202122 is a deficient number, since it is larger than the sum of its proper divisors (10515097301914).

21022022202122 is a wasteful number, since it uses less digits than its factorization.

21022022202122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362066952.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21022022202122 its reverse (22120222022012), we get a palindrome (43142244224134).

The spelling of 21022022202122 in words is "twenty-one trillion, twenty-two billion, twenty-two million, two hundred two thousand, one hundred twenty-two".