21110221112122 has 8 divisors (see below), whose sum is σ = 31875035851872. Its totient is φ = 10485209161500.

The previous prime is 21110221112081. The next prime is 21110221112129. The reversal of 21110221112122 is 22121112201112.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21110221112122.

It is not an unprimeable number, because it can be changed into a prime (21110221112129) 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, 34950696904 + ... + 34950697507.

It is an arithmetic number, because the mean of its divisors is an integer number (3984379481484).

Almost surely, 2^{21110221112122} is an apocalyptic number.

21110221112122 is a deficient number, since it is larger than the sum of its proper divisors (10764814739750).

21110221112122 is a wasteful number, since it uses less digits than its factorization.

21110221112122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69901394564.

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

Adding to 21110221112122 its reverse (22121112201112), we get a palindrome (43231333313234).

The spelling of 21110221112122 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty-one million, one hundred twelve thousand, one hundred twenty-two".