21102120022 has 8 divisors (see below), whose sum is σ = 31744400616. Its totient is φ = 10520653152.

The previous prime is 21102119993. The next prime is 21102120041. The reversal of 21102120022 is 22002120112.

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 = 21102119984 and 21102120011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15202563 + ... + 15203950.

It is an arithmetic number, because the mean of its divisors is an integer number (3968050077).

Almost surely, 2^21102120022 is an apocalyptic number.

21102120022 is a deficient number, since it is larger than the sum of its proper divisors (10642280594).

21102120022 is a wasteful number, since it uses less digits than its factorization.

21102120022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30406862.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21102120022 its reverse (22002120112), we get a palindrome (43104240134).

The spelling of 21102120022 in words is "twenty-one billion, one hundred two million, one hundred twenty thousand, twenty-two".