21201101111122 has 8 divisors (see below), whose sum is σ = 31801777735500. Its totient is φ = 10600508532624.

The previous prime is 21201101111087. The next prime is 21201101111131. The reversal of 21201101111122 is 22111110110212.

It can be written as a sum of positive squares in 2 ways, for example, as 20639112494841 + 561988616281 = 4543029^2 + 749659^2 .

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 = 21201101111096 and 21201101111105.

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, 20376997 + ... + 21392152.

Almost surely, 2^{21201101111122} is an apocalyptic number.

21201101111122 is a deficient number, since it is larger than the sum of its proper divisors (10600676624378).

21201101111122 is a wasteful number, since it uses less digits than its factorization.

21201101111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42022940.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 21201101111122 its reverse (22111110110212), we get a palindrome (43312211221334).

The spelling of 21201101111122 in words is "twenty-one trillion, two hundred one billion, one hundred one million, one hundred eleven thousand, one hundred twenty-two".