21101002220122 has 8 divisors (see below), whose sum is σ = 34528912723872. Its totient is φ = 9591364645500.

The previous prime is 21101002219993. The next prime is 21101002220131. The reversal of 21101002220122 is 22102220010112.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21101002220096 and 21101002220105.

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, 479568232254 + ... + 479568232297.

It is an arithmetic number, because the mean of its divisors is an integer number (4316114090484).

Almost surely, 2^{21101002220122} is an apocalyptic number.

21101002220122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21101002220122 is a deficient number, since it is larger than the sum of its proper divisors (13427910503750).

21101002220122 is a wasteful number, since it uses less digits than its factorization.

21101002220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959136464564.

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

Adding to 21101002220122 its reverse (22102220010112), we get a palindrome (43203222230234).

The spelling of 21101002220122 in words is "twenty-one trillion, one hundred one billion, two million, two hundred twenty thousand, one hundred twenty-two".