21221111220122 has 8 divisors (see below), whose sum is σ = 34725454723872. Its totient is φ = 9645959645500.

The previous prime is 21221111220121. The next prime is 21221111220149. The reversal of 21221111220122 is 22102211112212.

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

It is a super-2 number, since 2×21221111220122² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21221111220094 and 21221111220103.

It is not an unprimeable number, because it can be changed into a prime (21221111220121) 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, 482297982254 + ... + 482297982297.

It is an arithmetic number, because the mean of its divisors is an integer number (4340681840484).

Almost surely, 2^{21221111220122} is an apocalyptic number.

21221111220122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21221111220122 is a deficient number, since it is larger than the sum of its proper divisors (13504343503750).

21221111220122 is a wasteful number, since it uses less digits than its factorization.

21221111220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964595964564.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21221111220122 its reverse (22102211112212), we get a palindrome (43323322332334).

The spelling of 21221111220122 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred eleven million, two hundred twenty thousand, one hundred twenty-two".