20211221111122 has 8 divisors (see below), whose sum is σ = 30316928975856. Its totient is φ = 10105578119172.

The previous prime is 20211221111117. The next prime is 20211221111141. The reversal of 20211221111122 is 22111112211202.

It is a happy number.

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

It is a super-2 number, since 2×20211221111122² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20211221111122.

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, 15431688 + ... + 16690099.

It is an arithmetic number, because the mean of its divisors is an integer number (3789616121982).

Almost surely, 2^{20211221111122} is an apocalyptic number.

20211221111122 is a deficient number, since it is larger than the sum of its proper divisors (10105707864734).

20211221111122 is a wasteful number, since it uses less digits than its factorization.

20211221111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32436392.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 20211221111122 its reverse (22111112211202), we get a palindrome (42322333322324).

The spelling of 20211221111122 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-one million, one hundred eleven thousand, one hundred twenty-two".