21122102122 has 8 divisors (see below), whose sum is σ = 34563439872. Its totient is φ = 9600955500.

The previous prime is 21122102117. The next prime is 21122102161. The reversal of 21122102122 is 22120122112.

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 2×21122102122² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122102096 and 21122102105.

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, 480047754 + ... + 480047797.

It is an arithmetic number, because the mean of its divisors is an integer number (4320429984).

Almost surely, 2^21122102122 is an apocalyptic number.

21122102122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21122102122 is a deficient number, since it is larger than the sum of its proper divisors (13441337750).

21122102122 is a wasteful number, since it uses less digits than its factorization.

21122102122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960095564.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21122102122 its reverse (22120122112), we get a palindrome (43242224234).

The spelling of 21122102122 in words is "twenty-one billion, one hundred twenty-two million, one hundred two thousand, one hundred twenty-two".