21110121222222 has 32 divisors (see below), whose sum is σ = 42283993749120. Its totient is φ = 7026085792800.

The previous prime is 21110121222193. The next prime is 21110121222263. The reversal of 21110121222222 is 22222212101112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21082029 + ... + 22060647.

It is an arithmetic number, because the mean of its divisors is an integer number (1321374804660).

Almost surely, 2^{21110121222222} is an apocalyptic number.

21110121222222 is an abundant number, since it is smaller than the sum of its proper divisors (21173872526898).

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

21110121222222 is a wasteful number, since it uses less digits than its factorization.

21110121222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984048.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21110121222222 its reverse (22222212101112), we get a palindrome (43332333323334).

The spelling of 21110121222222 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-two".