21112221122 has 16 divisors (see below), whose sum is σ = 31916490432. Its totient is φ = 10473587280.

The previous prime is 21112221101. The next prime is 21112221131. The reversal of 21112221122 is 22112221112.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21112221122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168323 + ... + 265625.

It is an arithmetic number, because the mean of its divisors is an integer number (1994780652).

Almost surely, 2^21112221122 is an apocalyptic number.

21112221122 is a deficient number, since it is larger than the sum of its proper divisors (10804269310).

21112221122 is a wasteful number, since it uses less digits than its factorization.

21112221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98153.

The product of its digits is 64, while the sum is 17.

Adding to 21112221122 its reverse (22112221112), we get a palindrome (43224442234).

The spelling of 21112221122 in words is "twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, one hundred twenty-two".