21202222211022 has 8 divisors (see below), whose sum is σ = 42404444422056. Its totient is φ = 7067407403672.

The previous prime is 21202222211017. The next prime is 21202222211111. The reversal of 21202222211022 is 22011222220212.

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

21202222211022 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21202222211022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1766851850913 + ... + 1766851850924.

It is an arithmetic number, because the mean of its divisors is an integer number (5300555552757).

Almost surely, 2^{21202222211022} is an apocalyptic number.

21202222211022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21202222211022 is a wasteful number, since it uses less digits than its factorization.

21202222211022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3533703701842.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21202222211022 its reverse (22011222220212), we get a palindrome (43213444431234).

The spelling of 21202222211022 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-two million, two hundred eleven thousand, twenty-two".